APA
Churchill G. A., . (2002). Marketing research. Fort Worth: Dryden Press.
Chicago
Churchill Gilbert A, . 2002. Marketing research. Fort Worth: Dryden Press.
Harvard
Churchill G. A., . (2002). Marketing research. Fort Worth: Dryden Press.
MLA
Churchill Gilbert A, . Marketing research. Fort Worth: Dryden Press. 2002.