APA (7th ed.) Citation

Wellek, R., & Warren, A. (1956). Theory of literature. A Harvest Book.

Chicago Style (17th ed.) Citation

Wellek, Rene, and Austin Warren. Theory of Literature. A Harvest Book, 1956.

MLA (8th ed.) Citation

Wellek, Rene, and Austin Warren. Theory of Literature. A Harvest Book, 1956.

Warning: These citations may not always be 100% accurate.