Churchill, G. A. (1999). Marketing research: Methodological foundations (7th ed.). Fort Worth: Dryden Press.
Dyfyniad Arddull ChicagoChurchill, Gilbert A. Marketing Research: Methodological Foundations. 7th ed. Fort Worth: Dryden Press, 1999.
Dyfyniad MLAChurchill, Gilbert A. Marketing Research: Methodological Foundations. 7th ed. Fort Worth: Dryden Press, 1999.
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