APA (7th ed.) Citation

O'Brien, J., Molnár, F., Savage, H. W., Wilcox, E. W., & Manning, M. (2008). The Devil: A Tragedy of the Heart and Conscience. Project Gutenberg.

Chicago Style (17th ed.) Citation

O'Brien, Joseph, Ferenc Molnár, Henry W. Savage, Ella Wheeler Wilcox, and Marie Manning. The Devil: A Tragedy of the Heart and Conscience. Project Gutenberg, 2008.

MLA (9th ed.) Citation

O'Brien, Joseph, et al. The Devil: A Tragedy of the Heart and Conscience. Project Gutenberg, 2008.

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