APA (7th ed.) Citation

Whitman, W., & Creeley, R. (1973). Whitman. Penguin.

Chicago Style (17th ed.) Citation

Whitman, Walt, and Robert Creeley. Whitman. Harmondsworth: Penguin, 1973.

MLA (9th ed.) Citation

Whitman, Walt, and Robert Creeley. Whitman. Penguin, 1973.