APA (7th ed.) Zitazioa

R, C. D. (2009). Business Research Methods (8th edition.). Tata McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

R, Cooper D. Business Research Methods. 8th edition. New Delhi: Tata McGraw-Hill, 2009.

MLA (9th ed.) Zitazioa

R, Cooper D. Business Research Methods. 8th edition. Tata McGraw-Hill, 2009.