Tull, D. S., & Hawkins, D. I. (1987). Marketing research: Measurement and method (4th ed.). Macmillan.
Chicago Style (17th ed.) CitationTull, Donald S., and Del I. Hawkins. Marketing Research: Measurement and Method. 4th ed. New York: Macmillan, 1987.
MLA (9th ed.) CitationTull, Donald S., and Del I. Hawkins. Marketing Research: Measurement and Method. 4th ed. Macmillan, 1987.
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