Sharma, D. (1988). Marketing research: Principles applications and cases. S.chand.
Chicago Style aipamenaSharma, D.D. Marketing Research: Principles Applications and Cases. New Delhi: S.chand, 1988.
MLA aipamenaSharma, D.D. Marketing Research: Principles Applications and Cases. S.chand, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.