APA (7th ed.) Citation

Mandino, O. (1968). The Greatest Saleman in the world. Bantam Books.

Chicago Style (17th ed.) Citation

Mandino, O.G. The Greatest Saleman in the World. New York: Bantam Books, 1968.

MLA (9th ed.) Citation

Mandino, O.G. The Greatest Saleman in the World. Bantam Books, 1968.

Warning: These citations may not always be 100% accurate.