Cita APA (7a ed.)

Warren, R. P. (1967). Understanding Poetry (3rd ed.). Holt, Rinehart and Winston.

Cita Chicago Style (17a ed.)

Warren, Robert Penn. Understanding Poetry. 3rd ed. New York: Holt, Rinehart and Winston, 1967.

Cita MLA (9a ed.)

Warren, Robert Penn. Understanding Poetry. 3rd ed. Holt, Rinehart and Winston, 1967.