Tull, D. S. a. . H. (1993). Marketing research: Measurement and method (6 Edition.).
Chicago Edition CitationTull, Donald S and Hawkins. Marketing Research: Measurement and Method. 6 Edition. PHI Learning Pvt. Ltd., New Delhi, 1993.
MLA citiranjeTull, Donald S and Hawkins. Marketing Research: Measurement and Method. 6 Edition. 1993.
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