@book{14013,
	author = {DuFour, Richard, and DuFour, Rebecca Burnette. and ebrary, Inc.},
	title = {Essentials for principals},
	publisher = {Solution Tree Press,},
	year = {c2012.},
	address = {Bloomington, Ind. :},
	note = {"A joint publication Solution Tree NAESP."},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10744047}
}