@book{24427,
	author = {Unger, Kimberly. and Novak, Jeannie,},
	title = {Game development essentails :},
	publisher = {Delmar/Cengage Learning,},
	year = {2012.},
	series = {Game development essentials},
	address = {Clifton Park, NY :},
	edition = {International ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1303/2011926286-b.html}
}