APA (7th ed.) Citation

Mandino. (2007). The greatest secret in the world / Og Mandino. Jaico Publishing.

Chicago Style (17th ed.) Citation

Mandino. The Greatest Secret in the World / Og Mandino. Hollywood, Florida: Jaico Publishing, 2007.

MLA (8th ed.) Citation

Mandino. The Greatest Secret in the World / Og Mandino. Jaico Publishing, 2007.

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