APA (7th ed.) Citation

Whitman, W. (1990). Leaves of grass. Project Gutenberg.

Chicago Style (17th ed.) Citation

Whitman, Walt. Leaves of Grass. Champaign, Ill: Project Gutenberg, 1990.

MLA (9th ed.) Citation

Whitman, Walt. Leaves of Grass. Project Gutenberg, 1990.

Warning: These citations may not always be 100% accurate.