APA (7th ed.) Citation

Trapp, J. B., Gray, D., & Boffey, J. (2002). Medieval English literature (2nd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Trapp, J. B., Douglas Gray, and Julia Boffey. Medieval English Literature. 2nd ed. New York [etc.]: Oxford University Press, 2002.

MLA (9th ed.) Citation

Trapp, J. B., et al. Medieval English Literature. 2nd ed. Oxford University Press, 2002.