APA (7th ed.) Citation

Twain, M., & Seelye, J. D. (1985). The adventures of Huckleberry Finn. Penguin Books.

Chicago Style (17th ed.) Citation

Twain, Mark, and John D. Seelye. The Adventures of Huckleberry Finn. Harmondsworth, Middlesex, England ; New York, N.Y., U.S.A.: Penguin Books, 1985.

MLA (9th ed.) Citation

Twain, Mark, and John D. Seelye. The Adventures of Huckleberry Finn. Penguin Books, 1985.