Aguirre, J. (2016). Culture, health, gender and coffee drinking: A Costa Rican perspective. British Food Journal, 118(1), 150-163.
Aquilino, W. S. (1991). Telephone versus face-to-face interviewing for household drug use surveys. International Journal of the Addictions, 27(1), 71-91.
Acquilino, W. S. (1994). Interview mode effects in surveys of drug and alcohol use. Public Opinion Quarterly, 58, 210-240.
Andrews, D., Nonnecke, B., & Preece, J. (2003). Electronic survey methodology: A case study in reaching hard-to-involve Internet users. International journal of human-computer interaction, 16(2), 185-210.
Aneshensel, C. S., Frerichs, R. R., Clark, V. A., & Yokopenic, P. A. (1982). Measuring depression in the community: a comparison of telephone and personal interviews. Public Opinion Quarterly, 46(1), 110-121.
Aquilino, W. S. (1998). Effects of interview mode on measuring depression in younger adults. Journal of Official Statis-tics, 14(1), 15.
Bachmann, D., Elfrink, J., & Vazzana, G. (1996). Tracking the progress of e-mail vs. snail-mail. Marketing Re-search, 8(2), 30.
Baker, K., Curtice, J. & Sparrow, N. (2003). Internet Poll Trial: Research Report.
Beck, K. H., Yan, A. F., & Wang, M. Q. (2009). A comparison of web-based and telephone surveys for assessing traffic safety concerns, beliefs, and behaviors. Journal of Safety Research, 40(5), 377-381.
Blasius, J., & Brandt, M. (2010). Representativeness in online surveys through stratified samples. Bulletin of Sociological Methodology/Bulletin de Méthodologie Sociologique, 107(1), 5-21..
Cartwright, D. W., Thompson, R. J., Poole, M. C., & Kester, D. D. (1999). Assessing Distance Learning Using a Website Survey. AIR 1999 Annual Forum Paper.
Casler, K., Bickel, L., & Hackett, E. (2013). Separate but equal? A comparison of participants and data gathered via Ama-zon’s MTurk, social media, and face-to-face behavioral testing. Computers in human behavior, 29(6), 2156-2160.
Chang, L., & Krosnick, J. A. (2009). National surveys via RDD telephone interviewing versus the Internet: Comparing sample representativeness and response quality. Public Opinion Quarterly, 73(4), 641-678.
Crawford, S., McCabe, S., Couper, M., & Boyd, C. (2002, August). From mail to web: improving response rates and data collection efficiencies. In International Conference on Improving Surveys (pp. 25-28).
Couper, M. P. (2011). The future of modes of data collection. Public Opinion Quarterly, 75(5), 889-908..
Courville, S. (2003). Use of indicators to compare supply chains in the coffee industry. Greener Management Internation-al, 43, 93-105.
Duffy, B., Smith, K., Terhanian, G., & Bremer, J. (2005). Comparing data from online and face-to-face sur-veys. International Journal of Market Research, 47(6), 615-639.
Dillman, D. A. (2000). Mail and Internet Surveys: The Tailored Design Method. John Wiley & Sons. Inc., New York: NY, Washington State University.
Dillman, D. A., & Bowker, D. K. (2001). The web questionnaire challenge to survey methodologists. Online social scienc-es, 53-71.
Fenig, S., Levav, I., Kohn, R., & Yelin, N. (1993). Telephone vs face-to-face interviewing in a community psychiatric sur-vey. American Journal of Public Health, 83(6), 896-898.
Fricker, S., Galesic, M., Tourangeau, R., & Yan, T. (2005). An experimental comparison of web and telephone sur-veys. Public Opinion Quarterly, 69(3), 370-392.
Forrest, E. (1999). Internet Marketing Research, McGraw-Hill, Sydney.
Goldstein, K. M., & Jennings, M. K. (2002). The effect of advance letters on cooperation in a list sample telephone sur-vey. The Public Opinion Quarterly, 66(4), 608-617.
Groves, R. M. (1979). Actors and questions in telephone and personal interview surveys. Public Opinion Quarterly, 43(2), 190-205.
Hanspal, S. (2010). Consumer Survey on Sustainable Tea & Coffee Consumption. New Delhi: Partners in Change.
Henson, R., Roth, A., & Cannell, C. F. (1977). Personalversus telephone interviews: The effects of telephonereinter-views on reporting of psychiatric symptomatology.In National Center for Health Services Research ReportSeries, Ex-periments in interviewing techniques: Fieldexperiments in health reporting, 1971-1977) ,205-219
Hippler, H. J., Schwarz, N., & Sudman, S. (Eds.). (2012). Social information processing and survey methodology. Springer Science & Business Media.
Hox, J. J., & De Leeuw, E. D. (1994). A comparison of nonresponse in mail, telephone, and face-to-face surveys. Quality and Quantity, 28(4), 329-344.
Howard, P. E., Rainie, L., & Jones, S. (2001). Days and nights on the Internet: The impact of a diffusing technolo-gy. American Behavioral Scientist, 45(3), 383-404.
Jarvis, S. (2002). CMOR finds survey refusal rate still rising. Marketing News, 36(3), 4.
Lazar, J., & Preece, J. (2002). Social considerations in online communities: Usability, sociability, and success factors. na.
Lewis, J., & Runsten, D. (2008). Is Fair Trade-organic coffee sustainable in the face of migration? Evidence from a Oaxa-can Community. Globalizations, 5(2), 275-290.
Ilieva, J., Baron, S., & Healey, N. M. (2002). Online surveys in marketing research. International Journal of Market Re-search, 44(3), 1-14.
Liljeberg, H., & Krambeer, S. (2012). Bevölkerungs-repräsentative Onlinebefragungen. Die Entdeckung des Scharzen Schimmel.
Linton, A. (2005). Partnering for sustainability: business–NGO alliances in the coffee industry. Development in Prac-tice, 15(3-4), 600-614.
Lyberg, L., & Kasprzyk, D. (2004). Data collection methods and measurement error: an overview. Measurement errors in surveys, 235-257.
Lindhjem, H., & Navrud, S. (2011). Are Internet surveys an alternative to face-to-face interviews in contingent valua-tion?. Ecological economics, 70(9), 1628-1637.
Maguire, K. B. (2009). Does mode matter? A comparison of telephone, mail, and in-person treatments in contingent valu-ation surveys. Journal of environmental management, 90(11), 3528-3533.
Malhotra, N., & Birks, D. (2007). Marketing Research: an applied approach: 3rd European Edition. Pearson education.
Marcus, A. C., & Crane, L. A. (1986). Telephone surveys in public health research. Medical Care, 24(2), 97-112.
McDonald, H., & Adam, S. (2003). A comparison of online and postal data collection methods in marketing re-search. Marketing intelligence & planning, 21(2), 85-95.
Miller, C. (1995). In‐depth interviewing by telephone: Some practical considerations. Evaluation & Research in Educa-tion, 9(1), 29-38.
Midanik, L. T., & Greenfield, T. K. (2003). Telephone versus in-person interviews for alcohol use: results of the 2000 Na-tional Alcohol Survey. Drug and alcohol dependence, 72(3), 209-214.
Moberg, D. P. (1983). Identifying adolescents with alcohol problems. A field test of the Adolescent Alcohol Involvement Scale. Journal of Studies on Alcohol, 44(4), 701-721.
Newman, J. C., Des Jarlais, D. C., Turner, C. F., Gribble, J., Cooley, P., & Paone, D. (2002). The differential effects of face-to-face and computer interview modes. American journal of public health, 92(2), 294-297.
Szolnoki, G., & Hoffmann, D. (2013). Online, face-to-face and telephone surveys—Comparing different sampling meth-ods in wine consumer research. Wine Economics and Policy, 2(2), 57-66.
Sweet, L. (2002). Telephone interviewing: is it compatible with interpretive phenomenological research?. Contemporary Nurse, 12(1), 58-63.
Terhanian, G. (2003). The unfulfilled promise of internet research. In MRS Conference Paper (Vol. 37)
Tausig, J. E., & Freeman, E. W. (1988). The next best thing to being there: Conducting the clinical research interview by telephone. American Journal of Orthopsychiatry, 58(3), 418-427.
Yeager, D. S., Krosnick, J. A., Chang, L., Javitz, H. S., Levendusky, M. S., Simpser, A., & Wang, R. (2011). Comparing the accuracy of RDD telephone surveys and internet surveys conducted with probability and non-probability sam-ples. Public opinion quarterly, 75(4), 709-747.
Yun, G. W., & Trumbo, C. W. (2000). Comparative response to a survey executed by post, e-mail, & web form. Journal of computer-mediated communication, 6(1), JCMC613.