@book{139301,
	author = {Engle, David E. and Arkowitz, Hal, and ebrary, Inc.},
	title = {Ambivalence in psychotherapy},
	publisher = {Guilford Press,},
	year = {c2006.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10172285}
}