@book{50774,
	author = {Isbister, Katherine and Schaffer, Noah},
	title = {Game usability :},
	publisher = {Morgan Kaufmann ;},
	year = {c2008},
	address = {San Francisco, Calif. :},
	note = {Includes index},
	url = {http://www.loc.gov/catdir/toc/fy1002/2008298522.html}
}