APA (7th ed.) Citation

Twain, M. (1872). Roughing it. American Pub. Co..

Chicago Style (17th ed.) Citation

Twain, Mark. Roughing It. Hartford, Conn.: American Pub. Co., 1872.

MLA (9th ed.) Citation

Twain, Mark. Roughing It. American Pub. Co., 1872.

Warning: These citations may not always be 100% accurate.