Cita APA (7th ed.)

Twain, M., & Cox, J. M. (1984). Life on the mississippi. Penguin Books.

Cita Chicago (17th ed.)

Twain, Mark, i James M. Cox. Life on the Mississippi. New York: Penguin Books, 1984.

Cita MLA (9th ed.)

Twain, Mark, i James M. Cox. Life on the Mississippi. Penguin Books, 1984.