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.
Cita Chicago Style (17a ed.)Main, Monica, Napoleon Hill, Jack Canfield, y 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.
Cita MLA (8a ed.)Main, Monica, et al. The Lost Secret: Unlocking the Hidden Chapters of Napoleon Hill's Think and Grow Rich. Waterside Productions, 2019.
Precaución: Estas citas no son 100% exactas.