@book{69914,
	author = {Picard, Robert G.},
	title = {Media economics :},
	publisher = {Sage,},
	year = {c1989.},
	series = {Sage commtext series ;},
	address = {California :},
	url = {http://www.loc.gov/catdir/enhancements/fy0655/89035550-d.html}
}