@book{17554,
	author = {Levin, Henry M. and McEwan, Patrick J.},
	title = {Cost-effectiveness analysis :},
	publisher = {Sage Publications,},
	year = {c2001.},
	address = {Thousand Oaks, Calif. :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0658/00009499-d.html}
}