@book{9394,
	author = {Tamayo y Tamayo, Mario and Instituto Colombiano de Estudios Superiores de Incolda (Calí)},
	title = {La investigación :},
	publisher = {ICFES,},
	year = {1999.},
	series = {Serie Aprender a Investigar ; },
	address = {Bogotá :},
	edition = {3a ed.}
}