Czaja, R. (1996). Designing surveys: A guide to decisions and procedures. Pine Forge.
Cita Chicago (17th ed.)Czaja, Ronald. Designing Surveys: A Guide to Decisions and Procedures. London: Pine Forge, 1996.
Cita MLA (9th ed.)Czaja, Ronald. Designing Surveys: A Guide to Decisions and Procedures. Pine Forge, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.