@book{223077,
	author = {Stake, Robert E.},
	title = {Assessing teachers for professional certification},
	publisher = {Emerald,},
	year = {2004.},
	series = {Advances in program evaluation,},
	address = {Bingley, UK :},
	url = {http://www.emeraldinsight.com/1474-7863/11}
}