APA (7th ed.) Citation

Twain, M. (1974). Letters from the earth. Perennial Library.

Chicago Style (17th ed.) Citation

Twain, Mark. Letters from the Earth. New York: Perennial Library, 1974.

MLA (9th ed.) Citation

Twain, Mark. Letters from the Earth. Perennial Library, 1974.

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