Dillman, D. A., Smyth, J. D., & Christian, L. M. (2009). Internet, mail, and mixed-mode surveys: The tailored design method (3rd ed.). Wiley & Sons.

Dillman, Don A., Jolene D. Smyth, and Leah Melani Christian. Internet, Mail, and Mixed-mode Surveys: The Tailored Design Method. 3rd ed. Hoboken, N.J.: Wiley & Sons, 2009.

Dillman, Don A., et al. Internet, Mail, and Mixed-mode Surveys: The Tailored Design Method. 3rd ed. Wiley & Sons, 2009.