Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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