@book{219657,
	author = {Wiggins, Grant P., and McTighe, Jay. and ebrary, Inc.},
	title = {The understanding by design guide to creating high-quality units},
	publisher = {ASCD,},
	year = {c2011.},
	address = {Alexandria, Va. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10471837}
}