Boyd, H. W. (1989). Marketing research: Text and cases (7ª ed.). Irwin.
Chicago-čujuhus (17. p.)Boyd, Harper W. Marketing Research: Text and Cases. 7ª ed. Irwin, 1989.
MLA-čujuhus (9. p.)Boyd, Harper W. Marketing Research: Text and Cases. 7ª ed. Irwin, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.