APA (7th ed.) Citation

Whitman, W. (2004). Song of Myself Selections. Project Gutenberg.

Chicago Style (17th ed.) Citation

Whitman, Walt. Song of Myself Selections. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Whitman, Walt. Song of Myself Selections. Project Gutenberg, 2004.

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