Dyfyniad APA

Kotler, P. (2005). Principles of marketing/6e (6th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Kotler, Philip. Principles of Marketing/6e. 6th ed. Delhi: Prentice Hall, 2005.

Dyfyniad MLA

Kotler, Philip. Principles of Marketing/6e. 6th ed. Prentice Hall, 2005.

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