Fink, A., & Kosecoff, J. (1998). How to conduct surveys: A step by step guide (2nd ed.). Sage.
Lua i Stíl Chicago (17ú heag.)Fink, Arlene, agus Jacqueline Kosecoff. How to Conduct Surveys: A Step by Step Guide. 2nd ed. Thousand Oaks, Calif: Sage, 1998.
Lua MLA (9ú heag.)Fink, Arlene, agus Jacqueline Kosecoff. How to Conduct Surveys: A Step by Step Guide. 2nd ed. Sage, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.