Cita APA (7th ed.)

Murphy, J. (1956). Secrets of succesful selling. Engelwood giftsPrentice Hall.

Cita Chicago (17th ed.)

Murphy, John. Secrets of Succesful Selling. NULL: Engelwood giftsPrentice Hall, 1956.

Cita MLA (9th ed.)

Murphy, John. Secrets of Succesful Selling. Engelwood giftsPrentice Hall, 1956.