@book{302,
	author = {Levin, Richard I. and Rubin, David S.},
	title = {Statistics for management /},
	publisher = {Prentice Hall,; Pearson Education,},
	year = {c1998 [Impression 2006.]},
	address = {Upper Saddle River, N.J. ; New Delhi :},
	edition = {7th ed.}
}