APA (7th ed.) Citation

Keats, J., & Colvin, S. (2011). Letters of John Keats to His Family and Friends. Project Gutenberg.

Chicago Style (17th ed.) Citation

Keats, John, and Sidney Colvin. Letters of John Keats to His Family and Friends. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Keats, John, and Sidney Colvin. Letters of John Keats to His Family and Friends. Project Gutenberg, 2011.

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