Tull, D. S. a. . H. (1990). Marketing research: Measurement and method (5 Edition.).
Chicago Edition CitationTull, Donald S and Hawkins. Marketing Research: Measurement and Method. 5 Edition. Macmillan & Co Ltd, New York, 1990.
MLA Edition CitationTull, Donald S and Hawkins. Marketing Research: Measurement and Method. 5 Edition. 1990.
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