@book{104731,
	author = {Perry, David. and DeMaria, Rusel, and ebrary, Inc.},
	title = {David Perry on game design},
	publisher = {Charles River Media,},
	year = {c2009.},
	address = {Boston, MA :},
	note = {Includes index.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10359291}
}