Cita APA (7th ed.)

Ries, A., & Trout, J. (1993). The 22 immutable laws of marketing: Violate them at your own risk. HarperBusiness.

Cita Chicago (17th ed.)

Ries, Al, i Jack Trout. The 22 Immutable Laws of Marketing: Violate Them at Your Own Risk. New York, NY: HarperBusiness, 1993.

Cita MLA (8th ed.)

Ries, Al, i Jack Trout. The 22 Immutable Laws of Marketing: Violate Them at Your Own Risk. HarperBusiness, 1993.