APA (7th ed.) Citation

Wellek, R., & Warren, A. (1956). Theory of literature (3rd ed.). Harcourt.

Chicago Style (17th ed.) Citation

Wellek, Rene, and Austin Warren. Theory of Literature. 3rd ed. New York: Harcourt, 1956.

MLA (9th ed.) Citation

Wellek, Rene, and Austin Warren. Theory of Literature. 3rd ed. Harcourt, 1956.