Churchill, G. I. (2002). Marketing Research (8th ed.). Pearson Education.
Lua i Stíl Chicago (17ú heag.)Churchill, Gilbert; Iacobucci. Marketing Research. 8th ed. New Delhi: Pearson Education, 2002.
Lua MLA (9ú heag.)Churchill, Gilbert; Iacobucci. Marketing Research. 8th ed. Pearson Education, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.