Boyd, H. W., & Westfall, R. (1972). Marketing research: Text and cases (3rd ed.). Irwin.
Chicago Style (17. basım) AtıfBoyd, Harper W., ve Ralph Westfall. Marketing Research: Text and Cases. 3rd ed. Illinois: Irwin, 1972.
MLA (9th ed.) AtıfBoyd, Harper W., ve Ralph Westfall. Marketing Research: Text and Cases. 3rd ed. Irwin, 1972.
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