@book{576,
	author = {Keller, Gerald. and Warrack, Brian.},
	title = {Statistics for management and economics /},
	publisher = {Duxbury Press,},
	year = {c1997.},
	address = {Belmont, CA :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1514/96018224-b.html}
}