Twain, M. (1962). Roughing it. Signet Classic.
Cita Chicago Style (17a ed.)Twain, Mark. Roughing It. New York, Estados Unidos: Signet Classic, 1962.
Cita MLA (9a ed.)Twain, Mark. Roughing It. Signet Classic, 1962.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.