APA (7th ed.) Citation

French, W. G. (1963). A companion to The grapes of wrath. Viking Press.

Chicago Style (17th ed.) Citation

French, Warren G. A Companion to The Grapes of Wrath. New York: Viking Press, 1963.

MLA (9th ed.) Citation

French, Warren G. A Companion to The Grapes of Wrath. Viking Press, 1963.