@book{615054,
	author = {Mendenhall, William. and Beaver, Robert J.},
	title = {Introduction to probability and statistics /},
	publisher = {Brooks/Cole, Cengage Learning,},
	year = {c2009.},
	address = {Belmont, CA :},
	edition = {13th ed. /},
	url = {http://www.loc.gov/catdir/enhancements/fy1104/2007931223-d.html}
}