Maier, C. T. (1994). Preaching the Crusades: Mendicant friars and the Cross in the thirteenth century. Cambridge University Press.

Maier, Christoph T. Preaching the Crusades: Mendicant Friars and the Cross in the Thirteenth Century. New York: Cambridge University Press, 1994.

Maier, Christoph T. Preaching the Crusades: Mendicant Friars and the Cross in the Thirteenth Century. Cambridge University Press, 1994.