@book{30346,
	author = {Mankiw, N. Gregory.},
	title = {Essentials of economics.},
	publisher = {South-Western Cengage Learning,},
	year = {2008.},
	address = {Mason, OH :},
	edition = {5th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1104/2008935335-b.html}
}