@book{201186,
	author = {Torres Degro, Arnaldo. and Afanador Mejias, Evelyn.},
	title = {Estadistica descriptiva en el campo social puertorriqueño 2005 /},
	publisher = {Arnaldo Torres Degro ,},
	year = {2005.},
	address = {Mayagüez, PR :},
	edition = {1a ed.}
}