Cita APA (7th ed.)

Twain, M. (1987). The autobiography of Mark Twain. English Language Programs Division.

Cita Chicago (17th ed.)

Twain, Mark. The Autobiography of Mark Twain. Washington, Estados Unidos: English Language Programs Division, 1987.

Cita MLA (9th ed.)

Twain, Mark. The Autobiography of Mark Twain. English Language Programs Division, 1987.