Cita APA (7a ed.)

Ries, A. (2001). Positioning (5th.). Wiley India Pvt. Ltd.

Cita Chicago Style (17a ed.)

Ries, Al. Positioning. 5th. New Delhi: Wiley India Pvt. Ltd, 2001.

Cita MLA (9a ed.)

Ries, Al. Positioning. 5th. Wiley India Pvt. Ltd, 2001.