APA (7th ed.) Citation

Steinbeck, J. (1986). Once there was a war. Penguin Books.

Chicago Style (17th ed.) Citation

Steinbeck, John. Once There Was a War. New York u.a: Penguin Books, 1986.

MLA (9th ed.) Citation

Steinbeck, John. Once There Was a War. Penguin Books, 1986.