Czaja, R., & Blair, J. (1996). Designing surveys: A guide to decisions and procedures. Pine Forge Press.
Lua i Stíl Chicago (17ú heag.)Czaja, Ron, agus Johnny Blair. Designing Surveys: A Guide to Decisions and Procedures. Thousand Oaks, Calif: Pine Forge Press, 1996.
Lua MLA (9ú heag.)Czaja, Ron, agus Johnny Blair. Designing Surveys: A Guide to Decisions and Procedures. Pine Forge Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.