Tull, D. S. a. . H. (1987). Marketing research: Measurement and method (4 Edition.).
Chicago Edition CitationTull, Donald S and Hawkins. Marketing Research: Measurement and Method. 4 Edition. Macmillan & Co Ltd, New York, 1987.
Deismireacht MLATull, Donald S and Hawkins. Marketing Research: Measurement and Method. 4 Edition. 1987.
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