Tull, D. S., & Hawkins, D. I. (1993). Marketing research: Measurement & method (6th ed.). PHI Learning.
Chicago Edition CitationTull, Donald S., and Del I. Hawkins. Marketing Research: Measurement & Method. 6th ed. New Delhi: PHI Learning, 1993.
MLA Edition CitationTull, Donald S., and Del I. Hawkins. Marketing Research: Measurement & Method. 6th ed. PHI Learning, 1993.
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