APA (7th ed.) Citation

Whitman, W., & Rossetti, W. M. (2005). Poems By Walt Whitman. Project Gutenberg.

Chicago Style (17th ed.) Citation

Whitman, Walt, and William Michael Rossetti. Poems By Walt Whitman. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Whitman, Walt, and William Michael Rossetti. Poems By Walt Whitman. Project Gutenberg, 2005.

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