APA aipamena

ETZEL, M. (2010). MARKETING (14TH.). TMH.

Chicago Style aipamena

ETZEL, MICAEL. MARKETING. 14TH. NEW DELHI: TMH, 2010.

MLA aipamena

ETZEL, MICAEL. MARKETING. 14TH. TMH, 2010.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.