Dyfyniad APA

Ries, A., & Trout, J. (2007). The 22 Immutable Laws of Marketing. Profile Books Ltd.

Dyfyniad Arddull Chicago

Ries, Al, and Jack Trout. The 22 Immutable Laws of Marketing. London: Profile Books Ltd, 2007.

Dyfyniad MLA

Ries, Al, and Jack Trout. The 22 Immutable Laws of Marketing. Profile Books Ltd, 2007.

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