@book{1133,
	author = {LIND, D.A. and MARCHAL, W.G. & WATHEN, S.A.},
	title = {Basics Statistics for Business and Economics.},
	publisher = {Mcgraw- Hill  Irwin,},
	year = {2011.},
	address = {New York,},
	edition = {7th Ed.}
}