@book{147348,
	author = {Wonnacott, Thomas H. and Wonnacott, Ronald J.},
	title = {Introductory statistics for business and economics /},
	publisher = {Wiley,},
	year = {1977.},
	series = {Wiley series in probability and mathematical statistics.},
	address = {New York :},
	edition = {2nd ed.},
	note = {Includes index.}
}