Churchill, G. A. (1992). Basic marketing research (2nd ed.). The Dryden Press.
Lua i Stíl Chicago (17ú heag.)Churchill, Gilbert A. Basic Marketing Research. 2nd ed. New York: The Dryden Press, 1992.
Lua MLA (9ú heag.)Churchill, Gilbert A. Basic Marketing Research. 2nd ed. The Dryden Press, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.