APA استشهاد

Boyd, H. W., & Westfall, R. S. (1977). Marketing research: Text and cases (4th ed.). Richard D. Irwin.

استشهاد بنمط شيكاغو

Boyd, Harper W., و Ralph Stasch Westfall. Marketing Research: Text and Cases. 4th ed. Illinois: Richard D. Irwin, 1977.

MLA استشهاد

Boyd, Harper W., و Ralph Stasch Westfall. Marketing Research: Text and Cases. 4th ed. Richard D. Irwin, 1977.