@book{1174,
	author = {BILLINGSLEY, P. and CROFT, D. J., HUNTSBERGER, D. V & WATSON, C. J.},
	title = {Statistical Inference for Management and Economics},
	publisher = {Allyn and Bacon,},
	year = {1986.},
	address = {Boston,},
	edition = {3rd Ed.}
}