APA aipamena

Etzel, M. J., & Walker, B. J. S. (2001). Marketing (12th ed.). McGraw-Hill.

Chicago Style aipamena

Etzel, Michael J., and Bruce J. Stanton Walker. Marketing. 12th ed. Boston: McGraw-Hill, 2001.

MLA aipamena

Etzel, Michael J., and Bruce J. Stanton Walker. Marketing. 12th ed. McGraw-Hill, 2001.