@book{5568,
	author = {Wadsworth, George & Bryan, Joseph.},
	title = {Introduction to probability and random variables /},
	publisher = {McGraw Hill,},
	year = {1960.},
	address = {[S.l.] :},
	note = {Import.},
	url = {http://www.amazon.com/exec/obidos/ASIN/007067650X/chopaconline-20}
}