@book{147393,
	author = {Christians, Clifford G. and ebrary, Inc.},
	title = {Normative theories of the media},
	publisher = {University of Illinois Press,},
	year = {c2009.},
	series = {History of communication},
	address = {Urbana :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10532349}
}