@book{56614,
	author = {Becker, Gary S. and Murphy, Kevin M. and ebrary, Inc.},
	title = {Social economics},
	publisher = {Belknap Press of Harvard University Press,},
	year = {2000.},
	address = {Cambridge, MA :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10326111}
}