Dyfyniad APA

Kotler, P. (2004). Ten deadly marketing sins: Signs and solutions.

Dyfyniad Arddull Chicago

Kotler, Philip. Ten Deadly Marketing Sins: Signs and Solutions. John Wiley & Sons: New York, 2004.

Dyfyniad MLA

Kotler, Philip. Ten Deadly Marketing Sins: Signs and Solutions. 2004.

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