BOYD H P. (1990). MARKETING RESEARCH: TEXT AND CASES (7TH.). IRWIN MCGRAW-HILL.
Cita Chicago (17th ed.)BOYD H P. MARKETING RESEARCH: TEXT AND CASES. 7TH. HOMEWOOD: IRWIN MCGRAW-HILL, 1990.
Cita MLA (9th ed.)BOYD H P. MARKETING RESEARCH: TEXT AND CASES. 7TH. IRWIN MCGRAW-HILL, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.