Tull, D. S. (1989). Marketing research: Measurement and method A text with cases. MacMillan.
Cita Chicago Style (17a ed.)Tull, Donald S. Marketing Research: Measurement and Method A Text with Cases. MacMillan, 1989.
Cita MLA (8a ed.)Tull, Donald S. Marketing Research: Measurement and Method A Text with Cases. MacMillan, 1989.
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