AAKER DAVID A. (1983). MARKETING RESEARCH (2ND.). JOHN WILEY AND SONS.
Cita Chicago (17th ed.)AAKER DAVID A. MARKETING RESEARCH. 2ND. JOHN WILEY AND SONS, 1983.
Cita MLA (9th ed.)AAKER DAVID A. MARKETING RESEARCH. 2ND. JOHN WILEY AND SONS, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.