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 [u.a.]: Ashgate, 2008.

MLA (8th ed.) Citation

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

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