APA (7th ed.) Citation

Helfer, R. (1997). Modoc: The true story of the greatest elephant that ever lived. HarperCollinsPublishers.

Chicago Style (17th ed.) Citation

Helfer, Ralph. Modoc: The True Story of the Greatest Elephant That Ever Lived. New York: HarperCollinsPublishers, 1997.

MLA (9th ed.) Citation

Helfer, Ralph. Modoc: The True Story of the Greatest Elephant That Ever Lived. HarperCollinsPublishers, 1997.

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