APA (7th ed.) Citation

Keats, J., & Robertson, M. (2007). Keats: Poems Published in 1820. Project Gutenberg.

Chicago Style (17th ed.) Citation

Keats, John, and M. Robertson. Keats: Poems Published in 1820. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Keats, John, and M. Robertson. Keats: Poems Published in 1820. Project Gutenberg, 2007.

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