APA (7th ed.) Citation

Main, M., Hill, N., Canfield, J., & Proctor, B. (2019). The lost secret: Unlocking the hidden chapters of Napoleon Hill's think and grow rich. Waterside Productions.

Chicago Style (17th ed.) Citation

Main, Monica, Napoleon Hill, Jack Canfield, and Bob Proctor. The Lost Secret: Unlocking the Hidden Chapters of Napoleon Hill's Think and Grow Rich. Cardiff-by-the-Sea, CA: Waterside Productions, 2019.

MLA (8th ed.) Citation

Main, Monica, et al. The Lost Secret: Unlocking the Hidden Chapters of Napoleon Hill's Think and Grow Rich. Waterside Productions, 2019.

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