@book{27706,
	author = {Penalva Buitrago, José.},
	title = {Cartas a un maestro :},
	publisher = {Biblioteca Nueva,},
	year = {2008.},
	series = {Biblioteca de la nueva educación ;},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/8834/}
}