APA (7th ed.) Citation

Pene du bois, W. (1940). The great Geppy. The Viking Press.

Chicago Style (17th ed.) Citation

Pene du bois, William. The Great Geppy. New York: The Viking Press, 1940.

MLA (9th ed.) Citation

Pene du bois, William. The Great Geppy. The Viking Press, 1940.