Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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