@book{84221,
	author = {Hernando Toscano López, Fredy,},
	title = {Metodología de la investigación :},
	publisher = {Universidad Externado de Colombia,},
	year = {[2018]},
	address = {Bogotá :},
	edition = {Primera edición.},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/70814/}
}