APA (7th ed.) Citation

Genicot, L., Wood, L., & Wood, R. (1967). Contours of the Middle Ages. Routledge & K. Paul.

Chicago Style (17th ed.) Citation

Genicot, Leopold, Laurence Wood, and Rona Wood. Contours of the Middle Ages. London: Routledge & K. Paul, 1967.

MLA (9th ed.) Citation

Genicot, Leopold, et al. Contours of the Middle Ages. Routledge & K. Paul, 1967.