APA (7th ed.) Citation

Ries, A., & Trout, J. (2001). Positioning: The battle for your mind. McGraw-Hill.

Chicago Style (17th ed.) Citation

Ries, Al, and Jack Trout. Positioning: The Battle for Your Mind. New York [etc.]: McGraw-Hill, 2001.

MLA (9th ed.) Citation

Ries, Al, and Jack Trout. Positioning: The Battle for Your Mind. McGraw-Hill, 2001.