@book{89953,
	author = {Epstein, Marc J. and Yuthas, Kristi.},
	title = {Measuring and improving social impacts :},
	publisher = {Berrett-Koehler Publishers,},
	year = {[2014]},
	address = {San Francisco :},
	edition = {First edition.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10837851}
}