Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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