AAKER DAVID A. (1983). MARKETING RESEARCH (2ND.). JOHN WILEY AND SONS.
Cita Chicago Style (17a ed.)AAKER DAVID A. MARKETING RESEARCH. 2ND. JOHN WILEY AND SONS, 1983.
Cita MLA (9a ed.)AAKER DAVID A. MARKETING RESEARCH. 2ND. JOHN WILEY AND SONS, 1983.
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