APA (7e ed.) Bronvermelding

Boyd, H. W., & Westfall, R. (1972). Marketing research: Text and cases (3rd ed.). Irwin.

Chicago (17e ed.) Bronvermelding

Boyd, Harper W., en Ralph Westfall. Marketing Research: Text and Cases. 3rd ed. Illinois: Irwin, 1972.

MLA (9e ed.) Bronvermelding

Boyd, Harper W., en Ralph Westfall. Marketing Research: Text and Cases. 3rd ed. Irwin, 1972.