@book{67672,
	author = {García Laguardia, Jorge Mario. and Luján Muñoz, Jorge.},
	title = {Guía de técnicas de investigación},
	publisher = {Casagrande,},
	year = {1978},
	address = {México, D. F. :},
	edition = {7. ed. corr. y aum.}
}