@book{94100,
	author = {Wonnacott, Thomas H. and Wonnacott, Ronald J.},
	title = {Introductory statistics for business and economics},
	publisher = {Wiley},
	year = {c1984.},
	series = {Wiley series in probability and mathematical statistics},
	address = {New York},
	edition = {3th ed.},
	note = {Includes index.}
}