Cita APA (7th ed.)

Steinbeck, J. (1939). The grapes of wrath. The Viking press.

Cita Chicago (17th ed.)

Steinbeck, John. The Grapes of Wrath. New York: The Viking press, 1939.

Cita MLA (8th ed.)

Steinbeck, John. The Grapes of Wrath. The Viking press, 1939.