APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.