APA (7th ed.) Citation

Twain, M. (1995). The man that corrupted Hadleyburg. Penguin books.

Chicago Style (17th ed.) Citation

Twain, Mark. The Man That Corrupted Hadleyburg. New York [etc.]: Penguin books, 1995.

MLA (9th ed.) Citation

Twain, Mark. The Man That Corrupted Hadleyburg. Penguin books, 1995.

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