Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Steinbeck, John. The Grapes of Wrath. Nueva York: The Viking Press, 1939.

Cita MLA (9th ed.)

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