Connor, T. (2003). Soft sell: The new art of selling (4th.).
Lua i Stíl Chicago (17ú heag.)Connor, Tim. Soft Sell: The New Art of Selling. 4th. Mumbai, 2003.
Lua MLA (9ú heag.)Connor, Tim. Soft Sell: The New Art of Selling. 4th. 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.