@book{73556,
	author = {Cotton, Kathleen. and ebrary, Inc.},
	title = {Principals and student achievement},
	publisher = {Association for Supervision and Curriculum Development,},
	year = {c2003.},
	address = {Alexandria, Va. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10047160}
}