@book{31769,
	author = {Bierman, Harold and Bonini, Charles P.},
	title = {Quantitative analysis for business decisions},
	publisher = {R.D. Irwin},
	year = {1981.},
	series = {The Irwin series in quantitative analysis for business},
	address = {Homewood, Ill.},
	edition = {6th ed.}
}