@book{4905,
	author = {Bergstrom, Theodore C. and Varian, Hal R.},
	title = {Ejercicios de microeconomía intermedia},
	publisher = {Antoni Bosch},
	year = {1996},
	address = {Barcelona :},
	edition = {4a. ed.},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L128215.jpg}
}