@book{3994,
	author = {Olivera, Julio H.G.},
	title = {Economía clásica actual},
	publisher = {Ediciones Macchi},
	year = {1977},
	address = {Buenos Aires :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L127176.jpg}
}