@book{63808,
	author = {Everitt, Brian S. and Dunn, G.},
	title = {Applied multivariate data analysis},
	publisher = {Arnold Oxford University Press},
	year = {2001},
	address = {Londres (Inglaterra)},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0611/2001276408-t.html}
}