Lyberg, L., Biemer, P., Collins, M., Leeuw, E. D., Dippo, C., Schwarz, N., & Trewin, D. (1997). Survey measurement and process quality. Wiley.
Cita Chicago (17th ed.)Lyberg, Lars, Paul Biemer, Martin Collins, Edith De Leeuw, Cathryn Dippo, Norbert Schwarz, i Dennis Trewin. Survey Measurement and Process Quality. Nueva York: Wiley, 1997.
Cita MLA (9th ed.)Lyberg, Lars, et al. Survey Measurement and Process Quality. Wiley, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.