| Jonathan Riley-Smith |
A History of the Crusades Vol. III: The Fourteenth and Fifteenth Centuries, by Harry W. Hazard |
|
45/2, p. 236 |
| S.M. Stern |
Peter the Venerable and Islam, by J. Kritzeck |
|
35/3, p. 248 |
| Anthony Luttrell |
The Spanish Church and the Papacy in the Thirteenth Century. (Cambridge Studies in Medieval Life and Thought: Third Series, volume 4), by Peter Linehan, Peter Lineham |
|
41/3, p. 285 |