APA (7th ed.) Citation

Thoreau, H. D., & Witherell, E. H. (2001). Collected essays and poems. Library of America.

Chicago Style (17th ed.) Citation

Thoreau, Henry David, and Elizabeth Hall Witherell. Collected Essays and Poems. New York: Library of America, 2001.

MLA (9th ed.) Citation

Thoreau, Henry David, and Elizabeth Hall Witherell. Collected Essays and Poems. Library of America, 2001.