@book{13566,
	author = {Friis, Robert H.},
	title = {Epidemiology 101 /},
	publisher = {Jones and Bartlett Publishers, Inc.,},
	year = {c2010.},
	series = {Essential public health series},
	address = {Sudbury, Mass. :},
	url = {http://www.loc.gov/catdir/toc/ecip0828/2008041624.html}
}