@book{166148,
	author = {Stronge, James H. and Xu, Xianxuan. and ebrary, Inc.},
	title = {Principal evaluation},
	publisher = {ASCD,},
	year = {c2013.},
	address = {Alexandria, Va. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10675765}
}