Churchill, G. A. (1983). Marketing research: Methodological foundations (3rd ed.). Dryden press.
Dyfyniad Arddull ChicagoChurchill, Gilbert A. Marketing Research: Methodological Foundations. 3rd ed. Chicago: Dryden press, 1983.
Dyfyniad MLAChurchill, Gilbert A. Marketing Research: Methodological Foundations. 3rd ed. Dryden press, 1983.
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