@book{154632,
	author = {John, Simon},
	title = {Crusading and warfare in the Middle Ages :},
	publisher = {Ashgate,},
	year = {2014.},
	series = {Crusades - Subsidia ;},
	address = {Surrey, England ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10892243}
}