Churchill, G. A. (1983). Marketing research: Methodological foundations (3rd ed.). Chicago: Dryden Press.
Παραπομπή Chicago StyleChurchill, Gilbert A. Marketing Research: Methodological Foundations. 3rd ed. Chicago: Dryden Press, 1983.
Παραπομπή MLAChurchill, Gilbert A. Marketing Research: Methodological Foundations. 3rd ed. Chicago: Dryden Press, 1983.
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