APA (7th ed.) Citation

Helprin, M. (2005). Freddy and Fredericka. Penguin Press.

Chicago Style (17th ed.) Citation

Helprin, Mark. Freddy and Fredericka. New York: Penguin Press, 2005.

MLA (8th ed.) Citation

Helprin, Mark. Freddy and Fredericka. Penguin Press, 2005.

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