APA (7th ed.) Citation

Keats, J., & Cook, E. (1990). John Keats. Oxford University Press.

Chicago Style (17th ed.) Citation

Keats, John, and Elizabeth Cook. John Keats. Oxford ; New York: Oxford University Press, 1990.

MLA (9th ed.) Citation

Keats, John, and Elizabeth Cook. John Keats. Oxford University Press, 1990.