Effects of Trustworthıness, Attractiveness and Expertness on Brand Attitude, Purchase Intention and E-Word-of-Mouth Marketing: The Case of Instagram

Year 2019, Issue: 38, 85 - 107, 31.12.2019

İbrahim Avcı , Emel Yıldız

https://doi.org/10.35343/kosbed.569351

Cited By: 14

Abstract

Instagram's rapid growth and popularity has paved the way for the emergence of the so-called influencer, known as the new celebrities of the digital world. The current research was carried out on the Instagram Influencers. The main purpose of the study is to determine whether the trustworthiness, attractiveness and expertness features of Instagram influencers have an effect on
consumers' brand attitude, purchasing intention, and electronic word of mouth. Electronic questionnaire form which was prepared for this purpose was applied to 470 Instagram usersanalysis of the obtained data, it was found that while trustworthiness and attractiveness have positive effect on brand attitude, purchase intention and Word of mouth, expertness has no significant effect.  betwen the age of 18-38 years known as Y generation between 15.11.2018-22.11.2018. As a result of analysis of the obtained data, it was found that while trustworthiness and attractiveness have positive effect on brand attitude, purchase intention and Word of mouth, expertness has no significant effect.

Keywords

Instagram, Influencer, Trustworthiness, Attractiveness, Expertness

Fenomenlerin Güvenilirlik, Çekicilik Ve Uzmanlık Özelliklerinin Marka Tutumu, Satın Alma Niyeti Ve Elektronik Kulaktan Kulağa Pazarlama Üzerindeki Etkileri: İnstagram Örneği

Abstract

İnstagram’ın
hızlı büyümesi ve popüler olması bu platformda Fenomen olarak tabir edilen ve
dijital dünyanın yeni ünlüleri olarak bilinen kişilerin ortaya çıkmasına zemin
hazırlamıştır. Mevcut araştırma da İnstagram Fenomenleri üzerine
gerçekleştirilmiştir. Araştırmanın temel amacı İnstagram fenomenlerinin
Güvenilirlik, Uzmanlık ve Çekicilik özelliklerinin, tüketicilerin marka tutumu,
satın alma niyeti ve elektronik kulaktan kulağa pazarlama davranışı üzerinde
etkisinin olup olmadığını belirlemektir. Bu amaçla hazırlanan elektronik anket
formu 15.11.2018 - 22.11.2018 tarih aralığında Y Jenerasyonu olarak bilinen
18-38 yaş aralığında yer alan 470 İnstagram kullanıcısına uygulanmıştır. Elde
edilen verilerin analizi neticesinde İnstagram fenomenlerinin güvenilirlik ve
çekicilik özelliklerinin marka tutumu, satın alma niyeti ve elektronik kulaktan
kulağa pazarlama davranışı üzerinde olumlu etkisinin olduğu ancak uzmanlık
özelliğinin marka tutumu, satın alma niyeti ve elektronik kulaktan kulağa
pazarlama davranışı üzerinde anlamlı bir etkisinin olmadığı sonucuna
ulaşılmıştır.

Keywords

İnstagram, Fenomen, Güvenilirlik, Çekicilik, Uzmanlık

References

• Ahmed, N., Farooq, O. ve Iqbal, J. (2014). “Credibility of Celebrity Endorsement and Buying Intentions an Evidence from Students of Islamabad, Pakistan”. International Letters of Social and Humanistic Sciences Online, 20(9), 1-13.
• Alboqami, H., Al-Karaghouli, W., Baeshen, Y., Erkan, I., Evans, C. ve Ghoneim, A. (2015). “Electronic Word of Mouth in Social Media: The Common Characteristics of Retweeted and Favourited Marketer Generated Content Posted on Twitter”. International Journal of Internet Marketing and Advertising, 9(4), 338-358.
• Amelina, D. ve Zhu, Y.Q. (2016). “Investigating Effectiveness of Source Credibility Elements on Social Commerce Endorsement: The Case of Instagram in Indonesia”. Pacific Asia Conference on Information Systems, Chiayi, 232.
• Amos, C., Holmes, G. ve Strutton, D. (2008). “Exploring the Relationship between Celebrity Endorser Effects and Advertising Effectiveness: A Quantitative Synthesis of Effect Size”. International Journal of Advertising, 27(2), 209-234.
• Anghel, C. (2009). The Effect of Celebrity Endorsements on Gift-Giving Purchases: An Application of the Elaboration Likelihood Model, (Yayımlanmamış Yüksek Lisans Tezi), University of South Florida, USA.
• Apeyoje, A. (2013). “Influence of Celebrity Endorsement of Advertisement on Students’ Purchase Intention”. Mass Communication, and Journalism, 3(3), 3-10.
• Arndt, J. (1967). “Role of Product-Related Conversations in the Diffusion of A New Product”. Journal of Marketing Research, 4(3), 291-295.
• Audi, M., Masri, R.A. ve Ghazzawi, K. (2015). “The Effect of Celebrity Endorsement on Creating Brand Loyalty: An Application on the Lebanese Cosmetic Sector’s Demand”. International Journal of Business Management and Economic Research (IJBMER), 6(5), 273-287.
• Avcılar, M.Y., Demirgüneş, B.K. ve Açar, M.F. (2018). “Instagram Reklamlarında Ürün Destekçisi Olarak Sosyal Medya Fenomeni Kullanımının Reklama Yönelik Tutum ve E-Wom Niyetine Etkilerinin İncelenmesi”. Pazarlama ve Pazarlama Araştırmaları Dergisi, 21, 1-27.
• Ayodeji O, A. ve Jarrar, Y. (2018). “Celebrity Endorsement and Its Impact on Consumer Perception: A Study of Globacom Nigeria Limited”. International Journal of Economics, Business and Management Research, 2(3), 28-46.
• Aziz, S., Ghani, U. ve Niazi, A. (2013). “Impact of Celebrity Credibility on Advertising Effectiveness”. Pakistan Journal of Commerce and Social Sciences, 7(1), 107-127.
• Baldinger, A. L. ve Rubinson, J. (1996). “Brand Loyalty: The Link Between Attitude and Behavior”. Journal of Advertising Research, 36(6), 22-35.
• Belch, G. E. ve Belch, M. A. (2004). “Advertising and Promotion: An Integrated Marketing Communications Perspective”. Boston: McGraw-Hill.
• Biehal, D., Gabriel, C. ve Stephens, E. (1992). “Attitude Toward the Ad and Brand Choicei”. Journal of Advertising, 21(3), 19-37.
• Bozbay Z., Karami A. ve Arghashi V. (2018). “The Relationship between Brand Love and Brand Attitude”. 2nd International Conference on Management and Business, Tebriz, Iran, 8-9 Mayıs, 1-10.
• Braatz, L.A. (2017). #Influencer Marketing on Instagram Consumer Responses Towards Promotional Posts: The Effects of Message Sidedness and Product Depiction, (Yayımlanmamış Yükseklisans Tezi), University of Twente, Netherland.
• Bush, A. J., Martin, C. A. ve Bush, V. D. (2004). “Sports Celebrity Influence on The Behavior of Generation Y”. Journal of Advertising Research, 44(1), 108–118.
• Carvalho, A.F.E.M. (2012). The Effects of Celebrity Endorsement on Consumers Purchasing Intentions, (Yayımlanmamış Yükseklisans Tezi), ISCTE Business School, Portugal.
• Chan, H.C.C., Mazodier, M. ve Remaud, H. (2016). “The Impact of Celebrity Endorsement on Wine Brands’ Likeability and Purchase Intention: A Chinese Perspective”. 9th Academy of Wine Business Research Conference, 2016.
• Chan, K., Ng, Y. ve Luk, E. (2013). “Impact of Celebrity Endorsement in Advertising on Brand Image Among Chinese Adolescents”. Young Consumers, 14(2), 167-179.
• Chaovalit, P. (2014). “Factors Influencing Cosmetics Purchase Intention in Thailand: A Study on The Relatıonship of Credibility and Reputation wıth The Persuasive Capabilities of Beauty Bloggers”. AU-GSB e-Journal, 7(1), 34-42.
• Charbonneau, J. ve Garland, R. (2006). “The Use of Celebrity Athletes As Endorsers: Views of the New Zealand General Public”. International Journal of Sports Marketing and Sponsorship, 7(4), 31-38.
• Chekima, F.Z., Wafa, S.A.W.S.K. ve Sulong, R.S. (2018). “The Impact of Celebrity Credibility on Purchase Intention of Cosmetic Products: The Moderating Role of Ethnocentrism”. Asian Journal of Economics, Business and Accounting, 7(1), 1-10.
• Chu, S. C. ve Kim, Y. (2011). “Determinants of Consumer Engagement in Electronic Word-of-Mouth (EWOM) in Social Networking Sites”. International Journal of Advertising, 30(1), 47-75.
• Çinkay, B. (2017). Sosyal Medya Pazarlamasında Ünlü Onaylayanların Tüketici Algısı ve Satın Alma Niyeti Üzerine Etkisi, (Yayımlanmamış Doktora Tezi) Kahramanmaraş Sütçü İmam Üniversitesi Sosyal Bilimler Enstitüsü İşletme Ana Bilim Dalı, Kahramanmaraş.
• Dangl, V. (2017). Social Media Influencer Marketing; An Empirical Study on Brand Sponsorships and the Effects on Credibility of Social Media Influencers in the Fitness Industry, (Yayımlanmamış Yükseklisans Tezi), Johannes Kepler University Linz, Austria.
• DeShields, O.W. (1992). “The Relationship Between Spokesperson Credibility and Purchase Intentions : A Proposed Theory and Experimental Evaluation”. FIU Electronic Theses and Dissertations. 2779.
• Dissanayake D.M.R. ve Weerasiri R.A.S. (2017). “The Impact of Perceived Effectiveness of Celebrity Endorsement on Perceived Brand Personality”. J Account Mark, 6(3), 1-9.
• Dissanayake, D.M.R. ve Ismail, N. (2015). “Relationship between Celebrity Endorsement and Brand Attitude: With Reference to Financial Services Sector Brands in Sri Lanka”. 6th International Conference on Business & Information ICBI – 2015, Faculty of Commerce and Management Studies, University of Kelaniya, Sri Lanka, 472-487.
• Djafarova, E. ve Rushworth, C. (2017). “Exploring the Credibility of Online Celebrities' Instagram Profiles in Influencing The Purchase Decisions of Young Female Users”. Computers in Human Behavior, 68, 1-7.
• Doss, S. (2011). “The Transference of Brand Attitude: The Effect on the Celebrity Endorser”. Journal of Management and Marketing Research. 7(1), 1-11.Eisend, M. ve Langner, T. (2010). “Immediate and Delayed Advertising Effects of Celebrity Endorsers’ Attractiveness and Expertise”. International Journal of Advertising, 29(4), 527-546.
• Elli, D.M. (2017). The Phenomenon and Rise of Influencer Marketing and How It Affects Customer Opinion and Helps or Damages Brands, (Yayımlanmamış Yükseklisans Tezi), School of Science & Technology (SST), USA.
• Emma, N. ve Matilde, P. (2017). Title of Thesis Celebrities of Instagram - What Type of Content Influences Followers’ Purchase Intentions and Engagement Rate?, (Yayımlanmamış Yükseklisans Tezi), Aalto University, Finland.
• Erdoğan, B.Z. (1999). “Celebrity Endorsement: A Literature Review”. Journal of Marketing Management, 41(3), 291-314.
• Erdoğmuş, İ.E., Laka, H.S. ve Çiçek, M. (2016). “Attractive or Credible Celebrities: Who Endorses Green Products Better?”. Procedia - Social and Behavioral Sciences, 235, 587-594.
• Erkan, I. ve Evans, C. (2014). “The Impacts of Electronic Word of Mouth in Social Media on Consumers’ Purchase Intentions”. Proceedings of the International Conference on Digital Marketing (ICODM2014), Colombo, Sri Lanka, 9–14.
• Ewers, N.L. (2017). Influencer Marketing on Instagram An Analysis of the Effects of Sponsorship Disclosure, Product Placement, Type of Influencer and Their Interplay on Consumer Responses, (Unpublished Master Thesis), University of Twente, Netherland.
• Freeman, K. S. ve Chen, C.C. (2015). “Wither The Impact of Celebrity Endorsement, International Conference on Communications, Media, Technology and Design”. Dubai, UAE, 16–18 May 2015.
• Friedman, H. H., Termini, S. ve Washington, R. (1976). “The Effectiveness of Advertisements Utilizing Four Types of Endorsers”. Journal of Advertising, 5 (3), 22-24.
• Gaied A.M. ve Rached, K.S.B. (2010). “The Persuasive Effectiveness of Famous and Non Famous Endorsers in Advertising”. IBIMA Publishing, IBIMA Business Review, http://www.ibimapublishing.com/journals/IBIMABR/ibimabr.html.
• Garifova, L. F. (2016). “Realization of Small Businesses Economic Interests on Instagram”. Journal of Economics and Economic Education Research, 17, 133-139.Garland, R. ve Ferkins, L. (2003). “Evaluating New Zealand Sports Stars As Celebrity Endorsers: Intriguing Results”. Proceedings of ANZMAC Conference, University of South Australia, Adelaide (December), CD ROM, 122-129.
• Gautam, V. ve Kumar, M. (2011). “An Empirical Investigation of Factors Determining The Consumers’ Choice of Mobile Service Providers”. İşletme Araştırmaları Dergisi, 3 (4), 3-17.
• Kotler, P. (2005). A’dan Z’ye Pazarlama, 9. Baskı, MediaCat Kitapları.
• Gruber, A. (1970). “Purchase Intent and Purchase Probability”. Journal of Advertising Research, 10(1), 23-27.
• Hamid, N.A. ve Fern, C.Y.A. (2016). “Siti Nurhaliza and Purchase Intention Among University Students in Malaysia”. Indian Journal Of Arts, 6(17), 48-68.
• Hennig-Thurau, T., Gwinner, K.P., Walsh, G. ve Gremler, D.D. (2004). “Electronic Word-Of Mouth Via Consumer-Opinion Platforms: What Motivates Consumers to Articulate Themselves on the Internet?’. Journal of Interactive Marketing, 18(1),38–52.
• Hovland, C. I., Janis, I. L. ve Kelley, H. H. (1953). Communication and Persuasion, Psychological Studies Of Opinion Change. New Haven: Yale University Press.
• Ibok, ve Ibok,N. (2013). “Factors Determining the Effectiveness of Celebrity Endorsed Advertisements: The Case of Nigerian Telecommunication Industry”. American Journal of Business and Management, 2(3), 233-238.
• Jespersen, C.F. (2017). Celebrity Endorser’s Credibility: Effect on Consumers’ Attitude Toward Advertisement Factors Influencing Vloggers Credibility Among Viewers and Their Relation with Attitude Toward Advertisement, (Yayımlanmamış Yükseklisans Tezi), Luleå University of Technology, Sweden.
• Khalid, M. ve Siddiqui, D.A. (2018). Impact of celebrity endorsement on consumer buying behavior towards beauty soap in Karachi city. https://mpra.ub.uni-muenchen.de/89161/.
• Khan, K. S., Rukhsar, A. ve Shoaib, M. (2016). “Influence of Celebrity Endorsement on Consumer Purchase Intention”. Journal of Business and Management, 18(1), 6-9.
• Khan, S.A., Ramzan, N., Shoaib, M. ve Mohyuddin, A. (2015). “Impact Of Word Of Mouth On Consumer Purchase Intention”. Sci.Int.(Lahore), 27(1), 479-482.
• Kim, J-W., Choi, J., Qualls, W. Ve Han, K. (2008). “It Takes A Market Place Community to Raise Brand Commitment: The Role of Online Communities”. Journal of Marketing Management, 24, 409-431.
• Kim, S. & Choi, S. M. (2012). “Credibility Cues in Online Shopping: An Examination of Corporate Credibility, Retailer Reputation and Product Review Credibility”. International Journal of Internet Marketing and Advertising, 7(3), 217–236.
• Ko, E., Kim, K.H. ve Zhang, H. (2008). “A Cross Cultural Study of Antecedents of Purchase Intention for Sports Shoes In Korea and China”. Journal of Global Academy of Marketing Science, 18(1), 157-177.
• Lısıchkova, N. ve Othman, Z. (2017). The Impact Of Influencers On Onlıne Purchase Intent, School of Business, Society and Engineering, (Yayımlanmamış Yükseklisans Tezi), Mälardalen University, Sweden.
• Ling, K.C., Lau, T.C. ve Tan, H.P. (2010). “The Effects of Shopping Orientations, Online Trust, Prior Online Purchase Experience Toward Customers’ Online Purchase Intention”. International Business Research, 3 (3), 63-75.
• Liu, L., Parganas, P., Chadwick, S. ve Anagnostopoulos, C. (2016). “Sports Celebrity Endorsements of Luxury Brands: The Case of Chinese Consumers”. International Journal of Sport Management Recreation & Tourism, 25, 45-68.
• Lord, K. ve Putrevi, S. (2009). “The Effects of Informational and Transformational Motivations on Responses Toward Celebrity Endorsements”. Advances in Consumer Research, 8, 291-293.
• Loureiro, S. M. C. ve Sarmento, E. M. (2018). “The Role of Word-of-Mouth and Celebrity Endorsement in Online Consumer-Brand Relationship: The Context Of Instagram”. In 2018 Global Fashion Management Conference, 1119-1129, Tokyo.
• Malik, A. ve Sudhakar, B.D. (2014). “Brand Positioning Through Celebrity Endorsement – A Review Contribution to Brand Literature”. International Review of Management and Marketing, 4(4), 259-275.
• Malik, H.M. ve Qureshi, M.M. (2016). “The Impact of Celebrity Endorsement on Consumer Buying Behavior”. Journal of Marketing and Consumer Research, 126, 112-126.
• Messiaen, J. (2017). Influencer Marketıng How The Popularıty Threshold Of Instagram Influencers Impacts Consumer Behavıour: The Moderatıng Role Of Purchase Involvement, (Yayımlanmamış Yükseklisans Tezi), Gent University, Belgium.
• Mitchell, Andrew A. ve Jerry C. Olson, (1981). “Are Product a Beliefs the Only Mediator of Advertising Effects on Brand Attitud”., Journal of Marketing Research, 18 (August), 318-332.
• Munnuka, J., Uusitalo, O. ve Toivonen, H. (2016). “Credibility of A Peer Endorser and Advertising Effectiveness”. Journal of Consumer Marketing, 33(3), 182-192.
• Nhung, N.P., Sarinya, P. ve Claire, T.X.H. (2011). Effectiveness of Consumer Endorser in Social Media Advertisement Impact on Consumers Attitudes and Behaviors, (Yayımlanmamış Yükseklisans Tezi), Lund University, Sweden.
• Noushad P.M., Sajikumar, K.B. ve Vineeth, K.M. (2018). “Comparative Study of Influence of Celebrity Endorsements by Film Stars and Sportspersons with Special Reference to FMCG Products”. Research Revıew International Journal of Multidisciplinary, 3(8), 185-190.
• Ohanian, R (1990). “Construction and Validation of a Scale to Measure Celebrity Endorser’s Perceived Expertise, Trustworthiness and Attractiveness”. Journal of Advertising, 19(3): 39-52.
• Palmieri, L. (2013). Celebrity Endorsements in Print and Twitter: Comparing Brand Name Memorability and Credibility, (Yayımlanmamış Yükseklisans Tezi), The Rochester Institute of Technology, USA.
• Park, D. ve Kim, S. (2008). “The Effects of Consumer Knowledge on Message Processing of Electronic Word-Of-Mouth Via Online Consumer Reviews”. Electronic Commerce Research and Applications, 7(4), 399–410.
• Pikas, B., Schied, R. ve Pikas, A. (2012). “Assessing the Qualities of Athlete Endorsers: A Study of Consumer Preferences for the 3 Qualities of Sports Endorsers Attractiveness, Trustworthiness, Expertise”. Journal of Marketing Development and Competitiveness, 6(3), 42-55.
• Pornpitakpan, C. (2004). “The Effect of Celebrity Endorsers' Perceived Credibility on Product Purchase Intention”. Journal of International Consumer Marketing, 16(2), 55-74.
• Pritzen, P. (2012). Point, Set, Match: Examınıng The Impact Of Athlete Endorser Familiarıty And Endorser/Product Congruency On Consumer Attitude, Purchase Intentions And Percieved Endorser Credibility, (Yayımlanmamış Yükseklisans Tezi), University of Missouri, USA.
• Rachbini, W. (2018). “The Influence of Celebrity Endorsements on Purchase Intention (A Study on VIVO V7)”. IOSR Journal of Business and Management, 20(8), 59-66.
• Rebelo, M. (2017). How Influencers’ Credibility on Instagram is Perceived by Consumers and Its Impact on Purchase Intention, (Yayımlanmamış Yükseklisans Tezi), MSc. Universidade Católica Portuguesa, Portugal.
• Renton, K. (2006). The Relationship of Celebrity Advertisements to Consumer Attitudes and Purchases Intentions, (Yayımlanmamış Yükseklisans Tezi), The Florida State University, USA.
• Said, N.P.B.M. ve Napi, W.N.B.W. (2015). “Celebrity And Non-Celebrity Endorsement Effectiveness On Consumers’ Attitude Towards Advertisement”. International Academic Research Journal of Business and Technology, 1(2), 51-57.
• Saleem, F. (2017). “The Impact of Celebrity Endorsement on Brand Affection and Purchase Intention: The Mediating Role of Word of Mouth”. The Lahore Journal of Business, 5(2), 45-66.
• Samat, M.F., Ramlee, N.A.Z., Abu Bakar, H., Annual, N. ve Rasid, M.F.R.M. (2016). “Endorser Credibility and its Influence on The Purchase Intention of Social Networking Sites Consumer: A Mediating Role of Attitudes Towards SNS Advertising”. International Journal of Management and Applied Science (IJMAS), 2(12), 50-56.
• Schapers, R. (2013). The Rise of Influencer Marketing A Quantitative Study That Addresses Influencer Marketing on Instagram Together with the Impact of Sponsorship Disclosure, Colour Characteristics, Brand Involvement and Gender, (Yayımlanmamış Yükseklisans Tezi), Amsterdam Business School, Netherland.
• Seiler, R. ve Kucza, G. (2017). “Source Credibility Model, Source Attractıveness Model And Match-Up Hypothesıs – An Integrated Model”. Journal of International Scientific Publications: Economy and Business, 11(1), 1-15.
• Sertoğlu, A.E., Çatlı, Ö. ve Korkmaz, S. (2014). “Examining the Effect of Endorser Credibility on the Consumers' Buying Intentions: An Empirical Study in Turkey”. International Review of Management and Marketing, 4(1), 66-77.
• Sheinin, D.A.,Varki S. ve Ashley, C. (2011). “The Differential Effect of Ad Novelty and Message Usefulness on Brand Judgments”. Journal of Advertising, 40(3), 5-17.
• Shelton, J. ve Chiliya, N. (2014). “Brand Endorsements: An Exploratory Study into the Effectiveness of Using Video Game Characters as Brand Endorsers”. Mediterranean Journal of Social Sciences, 5(14), 260-275.
• Shimp, T. (1981). “Attitude Toward The Ad as a Mediator of Consumer Brand Choice”. Journal of Advertising Research, 10(2), 9-15.
• Smink, H.A. (2013). Combining Source Trustworthiness With Message Credibility. Are You Being Persuaded?, (Yayımlanmamış Yükseklisans Tezi), University Of Twente, Netherland.
• Spears, N. ve Singh, S. N. (2004). “Measuring Attitude Toward the Brand and Purchase Intentions”. Journal of Current Issues and Research in Advertising, 26(2), 54-66.
• Speck, P., Schumann, D. ve Thompson, C. (1988). “Celebrity Endorsements—Scripts, Schema and Roles: Theoretical Framework and Preliminary Tests”. Advances in Consumer Research, 15, 69-76.
• Stanley, S.M., Clow, K. ve James, K.E. (2011). “The Impact Of Visual Strategy and Race and Gender Congruency on Source Credibility of Print Advertisements”. The Marketing Management Journal, 21(2), 81-94.
• Şimşek, Ö. F. (2007). Yapısal Eşitlik Modellemesine Giriş Temel İlkeler ve LISREL Uygulamaları. Ankara: Ekinox.
• Tanjung, S. ve Hudrasyah, H. (2016). “The Impact Of Celebrity And Non-Celebrity Endorser Credibility In The Advertısement On Attitude Towards Advertisement, Attıtude Towards Brand and Purchase Intention”. International Conference on Ethics of Business, Economics, and Social Science, 231-245.
• Turanlı, M., Taşpınar Cengiz, P. ve Bozkır, Ö. (2012). “Faktör Analizi İle Üniversiteye Giriş Sınavlarındaki Başarı Durumuna Göre İllerin Sıralanması”. İstanbul Üniversitesi İktisat Fakültesi Ekonometri ve İstatistik Dergisi, 17, 45-68.
• Van der Waldt, D., Van Loggerenberg. ve M., Wehmeyer, L. (2009). “Celebrity Endorsements Versus Created Spokespersons in Advertising: A Survey Among Students”. SAJEMS, 12(1), 110-114.
• Wang, S.W. ve Scheinbaum, A.C. (2017). “Trustworthiness Trumps Attractiveness and Expertise: Enhancing Brand Credibility Through Celebrity Endorsement”. J. Advertising Res., 58(1), 1-42.
• Wang, X. (2018). “Responses to HIV Public Service Announcements: The Mediating Role of Attitude toward the Ad and Source Identification”. Intercultural Communication Studies, 27(1), 114-124.
• Wei, P.S. ve Lu, H.S. (2013). “An Examination of the Celebrity Endorsements and Online Customer Reviews Influence Female Consumers’ Shopping Behavior”. Computers In Human Behavior, 29, 193-201.
• Willemsen, L.M., Neijens, P.C. ve Bronner, F. (2012). “The Ironic Effect of Source Identification on the Perceived Credibility of Online Product Reviewers”. Journal of Computer-Mediated Communication, 18, 16-31.
• Wongweeranonchai, P. ve McClelland, R.J. (2016). “The Influence of Perceived Celebrity Endorser Credibility in Advertising on Purchase Intention of Thai Consumers”. Journal of Communication and Innovation, 3 (2), 115-136.
• Yan, Q., Wu, S., Wang, L. Wu, P. Chen, H. ve Wei, G. (2016). “E-Wom From E-Commerce Websites and Social Media: Which Will Consumers Adopt?”. Electronic Commerce Research And Applications, 17, 62-73.
• Zafar, Q.-U. ve Rafique, A. (2012). “Impact of Celebrity Advertisement on Customers‟ Brand Perception and Purchase Intention”. Asian Journal of Business and Management Sciences, 1(11), 53-67.
• Zang, D. (2014). The Impact of Two-Sided Messaging on Brand Attitude: an Attribution Theory Approach, (Yayımlanmamış Yükseklisans Tezi), Iowa State University, USA.
• Zhao, J. (2004). An Experimental Comparison of Celebrity Spokespersons’ Credibility, Attractiveness, Expertise, and Identification on Attitudes toward the Ads and Future Interest, (Yayımlanmamış Yükseklisans Tezi), University of Lethbridge, Canada.
• Zvinte, I. (2017). The Impact Of Endorser Credıbılıty On Brand Credıbılty: The Moderatıng Effect Of Involvement Into The Product Category, (Yayımlanmamış Yükseklisans Tezi), ISM University, Lithuanian.