Cita APA (7th ed.)

Steinbeck, J., & French, W. G. (1992). In dubious battle. Penguin Books.

Cita Chicago (17th ed.)

Steinbeck, John, i Warren G. French. In Dubious Battle. New York: Penguin Books, 1992.

Cita MLA (9th ed.)

Steinbeck, John, i Warren G. French. In Dubious Battle. Penguin Books, 1992.