@book{985,
	author = {Wonnacott, Thomas H., and Wonnacott, Ronald J.},
	title = {Introductory Statistics for Business and Economics /},
	publisher = {Wiley,},
	year = {c1990.},
	address = {New York :},
	edition = {4th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/wiley032/89033083.html}
}