MLA

Baugh, Albert C., and Kemp Malone. The Middle Ages : the Old Enlish Period (to 1100) and the Middle English Period (1100-1500). 2e ed. London: Routledge and Kegan, 1967.

APA

Baugh, A. C., & Malone, K. (1967). The Middle Ages : the Old Enlish period (to 1100) and the Middle English period (1100-1500). 2e ed. London: Routledge and Kegan.

Chicago

Baugh, Albert C., and Kemp Malone. The Middle Ages : the Old Enlish Period (to 1100) and the Middle English Period (1100-1500). 2e ed. London: Routledge and Kegan, 1967.