@book{143662,
	author = {Agazarian, Yvonne M. and Peters, Richard. and ebrary, Inc.},
	title = {The visible and invisible group},
	publisher = {Karnac,},
	year = {2004, c1981.},
	address = {London :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10428134}
}