@book{4819,
	author = {Samuelson, William. and Marks, Stephen G.},
	title = {Managerial economics /},
	publisher = {Wiley,},
	year = {c2003.},
	address = {New York, NY :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/bios/wiley045/2002279905.html}
}