Positioning

MLA

Ries, Al, and Jack Trout. Positioning : the Battle for Your Mind. 20th anniversary ed. New York: McGraw-Hill, 2001.

APA

Ries, A., & Trout, J. (2001). Positioning : the battle for your mind. 20th anniversary ed. New York: McGraw-Hill.

Chicago

Ries, Al., and Jack Trout. Positioning: The Battle for Your Mind. 20th anniversary ed. New York: McGraw-Hill, 2001.