Dyfyniad APA

Kurtz, D. L. (2007). Principles of marketing (12th ed.). Thomson Soth Western.

Dyfyniad Arddull Chicago

Kurtz, David L. Principles of Marketing. 12th ed. Australia: Thomson Soth Western, 2007.

Dyfyniad MLA

Kurtz, David L. Principles of Marketing. 12th ed. Thomson Soth Western, 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.