Cita APA (7th ed.)

Ries, A. (2001). Positioning. Tata McGraw-Hill.

Cita Chicago (17th ed.)

Ries, Al. Positioning. New Delhi: Tata McGraw-Hill, 2001.

Cita MLA (9th ed.)

Ries, Al. Positioning. Tata McGraw-Hill, 2001.