@book{83029,
	author = {Marco Stiefel, Berta.},
	title = {Competencias básicas :},
	publisher = {Narcea Ediciones,},
	year = {[2010]},
	series = {Colección Educacion hoy. Estudios},
	address = {Madrid :},
	note = {Contiene índice.},
	url = {https://elibro.net/ereader/politecnicointernacional/45932}
}