APA (7th ed.) Citation

Beers, H. A. (2008). Four Americans Roosevelt, Hawthorne, Emerson, Whitman. Project Gutenberg.

Chicago Style (17th ed.) Citation

Beers, Henry A. Four Americans Roosevelt, Hawthorne, Emerson, Whitman. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Beers, Henry A. Four Americans Roosevelt, Hawthorne, Emerson, Whitman. Project Gutenberg, 2008.

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