Dyfyniad APA

Kotler, P. (2006). Principles of marketing (11th.). Prentice Hall.

Dyfyniad Arddull Chicago

Kotler, Philip. Principles of Marketing. 11th. New Delhi: Prentice Hall, 2006.

Dyfyniad MLA

Kotler, Philip. Principles of Marketing. 11th. Prentice Hall, 2006.

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