Beri, G. C. (1993). Marketing research (Second edition.). Tata McGraw-Hill.
Chicago Style aipamenaBeri, G. C. Marketing Research. Second edition. New Delhi: Tata McGraw-Hill, 1993.
MLA aipamenaBeri, G. C. Marketing Research. Second edition. Tata McGraw-Hill, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.