Quigg, B., & Wisner, B. (1998). Selling the right way! Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Quigg, Brooke, agus Bern Wisner. Selling the Right Way! Upper Saddle River, N.J.: Prentice Hall, 1998.
Lua MLA (8ú heag.)Quigg, Brooke, agus Bern Wisner. Selling the Right Way! Prentice Hall, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.