Barber, M. (1995). Crusaders and heretics, 12th-14th centuries. Variorum collected studies series.
Style de citation Chicago (17e éd.)Barber, Malcolm. "Crusaders and Heretics, 12th-14th Centuries." Variorum Collected Studies Series 1995.
Style de citation MLA (8e éd.)Barber, Malcolm. "Crusaders and Heretics, 12th-14th Centuries." Variorum Collected Studies Series, 1995.
Attention : ces citations peuvent ne pas être correctes à 100%.