APA (7th ed.) Citation

Whitman, W. (1959). Leaves of grass (First edition.). Penguin.

Chicago Style (17th ed.) Citation

Whitman, Walt. Leaves of Grass. First edition. New York: Penguin, 1959.

MLA (9th ed.) Citation

Whitman, Walt. Leaves of Grass. First edition. Penguin, 1959.