@book{130958,
	author = {Spiegel, Murray R. and Stephens, Larry J.},
	title = {Schaum's outline of theory and problems of statistics /},
	publisher = {McGraw-Hill,},
	year = {c2008.},
	series = {Schaum's outline series},
	address = {New York :},
	edition = {4th ed. /},
	note = {Includes index.}
}