Dyfyniad APA

Beri, G. C. (1993). Marketing research (Second edition.). Tata McGraw-Hill.

Dyfyniad Arddull Chicago

Beri, G. C. Marketing Research. Second edition. New Delhi: Tata McGraw-Hill, 1993.

Dyfyniad MLA

Beri, G. C. Marketing Research. Second edition. Tata McGraw-Hill, 1993.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.