@book{89046,
	author = {Langs, Robert, and ebrary, Inc.},
	title = {Psychotherapy and science},
	publisher = {SAGE Publications,},
	year = {1999.},
	series = {Perspectives on psychotherapy},
	address = {London ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10392802}
}