APA (7th ed.) Citation

Constable, G. (2008). Crusaders and crusading in the twelfth century. Ashgate.

Chicago Style (17th ed.) Citation

Constable, Giles. Crusaders and Crusading in the Twelfth Century. Farnham, England ; Burlington, VT: Ashgate, 2008.

MLA (9th ed.) Citation

Constable, Giles. Crusaders and Crusading in the Twelfth Century. Ashgate, 2008.