APA Citation

Mandino, O. 1., & Mandino, O. 1. (1998). The greatest mystery in the world. New York, New York: Fawcett Crest.

Chicago Style Citation

Mandino, Og 1923-1996, and Og 1923-1996 Mandino. The Greatest Mystery in the World. New York, New York: Fawcett Crest, 1998.

MLA Citation

Mandino, Og 1923-1996, and Og 1923-1996 Mandino. The Greatest Mystery in the World. New York, New York: Fawcett Crest, 1998.

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