@book{13505,
	author = {Sokal, Robert R. and Rohlf, F. James,},
	title = {Introduction to biostatistics /},
	publisher = {Dover Publications,},
	year = {2009.},
	address = {Mineola, N.Y. :},
	edition = {2nd ed., Dover ed.},
	note = {Originally published: 2nd ed. New York : W.H. Freeman, 1987.},
	url = {http://www.loc.gov/catdir/enhancements/fy0903/2008048052-d.html}
}