Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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