@book{52691,
	author = {McQuail, Denis. and Windahl, Swen,},
	title = {Communication models :},
	publisher = {Longman,},
	year = {1993.},
	address = {London ;},
	edition = {2nd ed.},
	url = {http://www.gbv.de/dms/hbz/toc/ht005043217.pdf}
}