APA (7th ed.) Citation

Hill, D. A., Twain, M., Garofalo, G., & Vattani, M. The adventures of Tom Sawyer.

Chicago Style (17th ed.) Citation

Hill, David A., Mark Twain, Gianluca Garofalo, and Matteo Vattani. The Adventures of Tom Sawyer. London.

MLA (9th ed.) Citation

Hill, David A., et al. The Adventures of Tom Sawyer.