@book{1206,
	author = {Cassagne, Juan Carlos and Altamira Gigena, Julio Isidro},
	title = {Tratado general de los contratos públicos},
	publisher = {La Ley},
	year = {2013},
	address = {Buenos Aires :},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/Tratado General de los Contratos P?blicos(2013).jpg}
}