APA (7th ed.) Citation

Whitman, W., & Cowley, M. (1986). Walt Whitman's leaves of grass (First (1855) edition.). Penguin Books.

Chicago Style (17th ed.) Citation

Whitman, Walt, and Malcolm Cowley. Walt Whitman's Leaves of Grass. First (1855) edition. New York: Penguin Books, 1986.

MLA (9th ed.) Citation

Whitman, Walt, and Malcolm Cowley. Walt Whitman's Leaves of Grass. First (1855) edition. Penguin Books, 1986.