@book{31417,
	author = {Guerrero Dávila, Guadalupe. and Guerrero Dávila, Ma. Concepción.},
	title = {Metodología de la investigación  },
	publisher = {Grupo editorial Patria },
	year = {2011.},
	series = {Integral por competencias},
	address = {México },
	edition = {1a ed.}
}