Murphy, J. (1956). Secrets of succesful selling. Engelwood giftsPrentice Hall.
Lua i Stíl Chicago (17ú heag.)Murphy, John. Secrets of Succesful Selling. NULL: Engelwood giftsPrentice Hall, 1956.
Lua MLA (9ú heag.)Murphy, John. Secrets of Succesful Selling. Engelwood giftsPrentice Hall, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.