APA (7th ed.) Citation

Twain, M. (2005). The Man That Corrupted Hadleyburg. Project Gutenberg.

Chicago Style (17th ed.) Citation

Twain, Mark. The Man That Corrupted Hadleyburg. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Twain, Mark. The Man That Corrupted Hadleyburg. Project Gutenberg, 2005.

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