@book{87049,
	author = {Gerstman, B. Burt.},
	title = {Basic biostatistics :},
	publisher = {Jones and Bartlett Publishers,},
	year = {2015.},
	address = {Sudbury, Mass. :},
	url = {http://www.loc.gov/catdir/toc/ecip079/2007003334.html}
}