@book{29230,
	author = {Fresno Chávez, Caridad.},
	title = {Siglo XXI :},
	publisher = {Editorial Universitaria,},
	year = {2013.},
	address = {La Habana :},
	note = {Contiene índice.},
	url = {https://elibro.net/ereader/politecnicointernacional/100775}
}