Boyd, H. W., & Westfall, R. L. (1972). Marketing research: Text and cases (3rd ed.). R. D. Irwin.
Chicago Style (17th ed.) CitationBoyd, Harper W., and Ralph L. Westfall. Marketing Research: Text and Cases. 3rd ed. Homewood, Ill: R. D. Irwin, 1972.
ציטוט MLABoyd, Harper W., and Ralph L. Westfall. Marketing Research: Text and Cases. 3rd ed. R. D. Irwin, 1972.
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