APA (7th ed.) Citation

Keller, J. (2008). Mr. Gatling's terrible marvel: The gun that changed everything and the misunderstood genius who invented it. Viking.

Chicago Style (17th ed.) Citation

Keller, Julia. Mr. Gatling's Terrible Marvel: The Gun That Changed Everything and the Misunderstood Genius Who Invented It. New York: Viking, 2008.

MLA (9th ed.) Citation

Keller, Julia. Mr. Gatling's Terrible Marvel: The Gun That Changed Everything and the Misunderstood Genius Who Invented It. Viking, 2008.