@book{3393,
	author = {Wonnacott, Thomas H., and Wonnacott, Ronald J.},
	title = {Introductory statistics /},
	publisher = {Wiley,},
	year = {c1990.},
	series = {Wiley series in probability and mathematical statistics.},
	address = {New York :},
	edition = {Fifth edition.},
	note = {R.J. Wonnacott's name appears first on the 4th ed.}
}