@book{193382,
	author = {Bercovitz Rodríguez-Cano, Rodrigo. and Valladares Rascón , Estelvina.},
	title = {Manual de introducción al derecho},
	publisher = {Bercal, S.A.},
	year = {1999.},
	address = {Madrid},
	edition = {4. ed.}
}