@book{172042,
	author = {Wigdor, Alexandra K. and ebrary, Inc.},
	title = {Performance assessment for the workplace.},
	publisher = {National Academy Press,},
	year = {1991.},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10056880}
}