Knowles, D., Brooke, C., & London, V. C. M. (2001). The heads of religious houses, England and Wales, I, 940-1216 (2nd ed.). Cambridge University Press.

Knowles, David, Christopher Brooke, and Vera C. M. London. The Heads of Religious Houses, England and Wales, I, 940-1216. 2nd ed. Cambridge, U.K. ; New York: Cambridge University Press, 2001.

Knowles, David, et al. The Heads of Religious Houses, England and Wales, I, 940-1216. 2nd ed. Cambridge University Press, 2001.