@book{7,
	author = {Mochón Morcillo, Francisco and Beker, Víctor Alberto},
	title = {Economía},
	publisher = {McGraw-Hill},
	year = {1997},
	address = {Madrid :},
	edition = {2a. ed},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/Economia Principios y Aplicaciones 2ed.jpg}
}