Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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