@book{8321,
	author = {Tamayo y Tamayo, Mario},
	title = {El proceso de la investigación científica :},
	publisher = {Limusa, },
	year = {c2002},
	series = {Area. Ciencias sociales},
	address = {México :},
	edition = {4 ed.},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/9038.pdf}
}