APA (7th ed.) Citation

Keats, J. (2008). Endymion A Poetic Romance. Project Gutenberg.

Chicago Style (17th ed.) Citation

Keats, John. Endymion A Poetic Romance. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Keats, John. Endymion A Poetic Romance. Project Gutenberg, 2008.

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