APA (7th ed.) Citation

Crocker, R., & Hiley. (1990). The early middle ages to 1300 (2a. ed.). Oxford University.

Chicago Style (17th ed.) Citation

Crocker, Richard, and Hiley. The Early Middle Ages to 1300. 2a. ed. Oxford: Oxford University, 1990.

MLA (9th ed.) Citation

Crocker, Richard, and Hiley. The Early Middle Ages to 1300. 2a. ed. Oxford University, 1990.