APA (7th ed.) Citation

Clemens, S. L., & Twain. Mental telegraphy.

Chicago Style (17th ed.) Citation

Clemens, Samuel L., and Twain. Mental Telegraphy. New York.

MLA (9th ed.) Citation

Clemens, Samuel L., and Twain. Mental Telegraphy.

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