APA (7th ed.) Citation

Barber, M. (1995). Crusaders and heretics, 12th - 14th centuries. Variorum.

Chicago Style (17th ed.) Citation

Barber, Malcolm. Crusaders and Heretics, 12th - 14th Centuries. Aldershot, Hampshire [u.a.]: Variorum, 1995.

MLA (9th ed.) Citation

Barber, Malcolm. Crusaders and Heretics, 12th - 14th Centuries. Variorum, 1995.

Warning: These citations may not always be 100% accurate.