APA (7th ed.) Citation

Steinbeck, J. (1989). The grapes of wrath ([50. anniversary ed.].). Viking [u.a.].

Chicago Style (17th ed.) Citation

Steinbeck, John. The Grapes of Wrath. [50. anniversary ed.]. New York: Viking [u.a.], 1989.

MLA (9th ed.) Citation

Steinbeck, John. The Grapes of Wrath. [50. anniversary ed.]. Viking [u.a.], 1989.