Dillman, D. A., Smyth, J. D., & Christian, L. M. (2009). Internet, mail, and mixed-mode surveys: The tailored design method (3rd ed.). Hoboken, NJ.: John Wiley & Sons.
Παραπομπή Chicago StyleDillman, Don A., Jolene D. Smyth, and Lean Melani Christian. Internet, Mail, and Mixed-mode Surveys: The Tailored Design Method. 3rd ed. Hoboken, NJ.: John Wiley & Sons, 2009.
Παραπομπή MLADillman, Don A., Jolene D. Smyth, and Lean Melani Christian. Internet, Mail, and Mixed-mode Surveys: The Tailored Design Method. 3rd ed. Hoboken, NJ.: John Wiley & Sons, 2009.
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