APA (7e ed.) Bronvermelding

Ries Al & Trout, J. (2001). Positioning: The battle for your mind (20th anniversary edition.). McGraw-Hill.

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

Ries Al en Jack Trout. Positioning: The Battle for Your Mind. 20th anniversary edition. McGraw-Hill, 2001.