@book{257469,
	author = {Juul, Jesper, and Viñas de Puig, Ricard,},
	title = {Su hijo, una persona competente :},
	publisher = {Herder,},
	year = {2012.},
	address = {Barcelona :},
	url = {https://www.digitaliapublishing.com/a/61195/}
}