MLA

Ridyard, Susan J, and Robert G Benson. Man and Nature In the Middle Ages. Sewanee: University of the South, 1995.

APA

Ridyard, S. J, & Benson, R. G. (1995). Man and nature in the middle ages. Sewanee: University of the South.

Chicago

Ridyard, Susan J. ed., and Robert G Benson ed. Man and Nature In the Middle Ages. Sewanee: University of the South, 1995.