@book{34902,
	author = {Bonivento Fernández, José Alejandro.},
	title = {Los principales contratos civiles y comerciales /},
	publisher = {Libreria Ediciones del Profesional,},
	year = {2005.},
	address = {Bogotá :},
	edition = {7 actualizada y ampliada.},
	note = {Ej.3: faltan paginas 433-440.}
}