@book{20444,
	author = {Cahn, Steven M.},
	title = {Ethics :},
	publisher = {Oxford University Press,},
	year = {2009.},
	address = {New York :},
	edition = {4th ed.},
	url = {http://catdir.loc.gov/catdir/toc/ecip0822/2008029061.html}
}