BOYD HARPER W. (1990). MARKETING RESEARCH: TEXT & CASES (7TH.). IRWIN MCGRAW-HILL.
Chicago-čujuhus (17. p.)BOYD HARPER W. MARKETING RESEARCH: TEXT & CASES. 7TH. HOMEWOOD: IRWIN MCGRAW-HILL, 1990.
MLA-čujuhus (9. p.)BOYD HARPER W. MARKETING RESEARCH: TEXT & CASES. 7TH. IRWIN MCGRAW-HILL, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.