@book{111068,
	author = {Kostick, Conor, and ebrary, Inc.},
	title = {The social structure of the First Crusade},
	publisher = {Brill,},
	year = {2008.},
	series = {The medieval Mediterranean,},
	address = {Leiden ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10363809}
}