@book{23543,
	author = {Bush, Heather M.},
	title = {Biostatistics:},
	publisher = {Delmar Cengage Learning,},
	year = {c2012.},
	series = {Public health professional},
	address = {Clifton Park, NY :},
	edition = {1st ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1211/2011925054-d.html}
}