@book{229036,
	author = {Gunther, and Andrea, Alfred J., and ebrary, Inc.},
	title = {The capture of Constantinople},
	publisher = {University of Pennsylvania Press,},
	year = {c1997.},
	series = {Middle Ages series},
	address = {Philadelphia :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10491986}
}