APA (7th ed.) Citation

Gaddis, W. (1985). JR. Penguin Books.

Chicago Style (17th ed.) Citation

Gaddis, William. JR. New York: Penguin Books, 1985.

MLA (9th ed.) Citation

Gaddis, William. JR. Penguin Books, 1985.

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