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.
Цитирование в стиле Чикаго (17-е изд.)Main, Monica, Napoleon Hill, Jack Canfield, и 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.
Цитирование MLA (8-е изд.)Main, Monica, et al. The Lost Secret: Unlocking the Hidden Chapters of Napoleon Hill's Think and Grow Rich. Waterside Productions, 2019.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.