APA Citation

Mandino, O. (1972). The greatest secret in the world. New York: Bantam Books.

Chicago Style Citation

Mandino, Og. The Greatest Secret in the World. New York: Bantam Books, 1972.

MLA Citation

Mandino, Og. The Greatest Secret in the World. New York: Bantam Books, 1972.

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