APA (7th ed.) Citation

Twain, M., & Holbrook, D. (1965). Roughing it. Cambridge University Press.

Chicago Style (17th ed.) Citation

Twain, Mark, and David Holbrook. Roughing It. [London]: Cambridge University Press, 1965.

MLA (9th ed.) Citation

Twain, Mark, and David Holbrook. Roughing It. Cambridge University Press, 1965.