Cita APA (7th ed.)
Ries, A., & Trout, J. (2001). Positioning: The battle for your mind (20th anniversary ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Ries, Al, i Jack Trout. Positioning: The Battle for Your Mind. 20th anniversary ed. New York: McGraw-Hill, 2001.
Cita MLA (9th ed.)
Ries, Al, i Jack Trout. Positioning: The Battle for Your Mind. 20th anniversary ed. McGraw-Hill, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.