@book{51284,
	author = {Becker, Gary S. and ebrary, Inc.},
	title = {A treatise on the family},
	publisher = {Harvard University Press,},
	year = {1991.},
	address = {Cambridge, MA :},
	edition = {Enl. ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10331329}
}