@book{1842,
	author = {Samuelson, Paul A. and Nordhaus, William D.},
	title = {Economics /},
	publisher = {McGraw-Hill/Irwin,},
	year = {c2005 [Reprinted 2006].},
	address = {Boston :},
	edition = {18th ed.},
	url = {http://www.loc.gov/catdir/toc/mh041/2004048113.html}
}