Cita APA (7th ed.)

MANDINO, O. (1978). The greatest salesman in the world. Bantam Books.

Cita Chicago (17th ed.)

MANDINO, OG. The Greatest Salesman in the World. Toronto: Bantam Books, 1978.

Cita MLA (9th ed.)

MANDINO, OG. The Greatest Salesman in the World. Bantam Books, 1978.