@book{1880,
	author = {Borda, Guillermo A.},
	title = {Manual de contratos},
	publisher = {Abeledo Perrot},
	year = {2004},
	address = {Buenos Aires :},
	edition = {20a. ed.},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/Manual de contratos-l87762.jpg}
}