@book{51874,
	author = {Windahl, Sven. and Signitzer, Benno.},
	title = {Using communication theory : },
	publisher = {Sage, },
	year = {1992.},
	address = {London : },
	url = {http://www.loc.gov/catdir/enhancements/fy0656/91050651-d.html}
}