Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.