APA (7th ed.) Citation

Twain, M. (1986). The adventures of Tom Sawyer. Penguin Books.

Chicago Style (17th ed.) Citation

Twain, Mark. The Adventures of Tom Sawyer. London [u.a.]: Penguin Books, 1986.

MLA (9th ed.) Citation

Twain, Mark. The Adventures of Tom Sawyer. Penguin Books, 1986.

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