@book{35062,
	author = {Rothman, Kenneth J. and Greenland, Sander,},
	title = {Modern epidemiology /},
	publisher = {Wolters Kluwer Health/Lippincott Williams & Wilkins,},
	year = {c2008.},
	address = {Philadelphia :},
	edition = {3rd ed., thoroughly rev. and updated.},
	url = {http://www.loc.gov/catdir/enhancements/fy0743/2007036316-d.html}
}