Cita APA (7a ed.)

Twain, M. (1880). Roughing it (Authorized ed.). Bernhard Tauchnitz.

Cita Chicago Style (17a ed.)

Twain, Mark. Roughing It. Authorized ed. Leipzig: Bernhard Tauchnitz, 1880.

Cita MLA (9a ed.)

Twain, Mark. Roughing It. Authorized ed. Bernhard Tauchnitz, 1880.