Signer, M. A., & Van Engen, J. (2001). Jews and Christians in Twelfth-Century Europe: Ed. by Michael A. Signer and John Van Engen. University of Notre Dame Press.

Signer, Michael A., and John Van Engen. Jews and Christians in Twelfth-Century Europe: Ed. by Michael A. Signer and John Van Engen. Notre Dame, Ind.: University of Notre Dame Press, 2001.

Signer, Michael A., and John Van Engen. Jews and Christians in Twelfth-Century Europe: Ed. by Michael A. Signer and John Van Engen. University of Notre Dame Press, 2001.