@book{11708,
	author = {Frank, Robert H. and Bernanke, Ben.},
	title = {Principles of economics /},
	publisher = {McGraw-Hill/Irwin,},
	year = {c2009.},
	address = {Boston :},
	edition = {Brief edition},
	url = {http://www.loc.gov/catdir/toc/ecip0820/2008024670.html}
}