Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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