@book{670,
	author = {Chao, Lincoln L. and Castaño, José María},
	title = {Estadística para las ciencias administrativas},
	publisher = {McGraw-Hill},
	year = {1975},
	address = {México :},
	edition = {2a. ed.},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/15994.jpg}
}