Cita APA (7a ed.)

Steinbeck, J. (1967). The Grapes of Wrath. Penguin Books.

Cita Chicago Style (17a ed.)

Steinbeck, John. The Grapes of Wrath. Harmondsworth: Penguin Books, 1967.

Cita MLA (9a ed.)

Steinbeck, John. The Grapes of Wrath. Penguin Books, 1967.