@book{500,
	author = {Monserrat Llairó, María de and Díaz, Marcela V.},
	title = {Historia económica y social del mundo contemporáneo},
	publisher = {Errepar},
	year = {2008},
	address = {Buenos Aires :},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/Historia economica y social del mundo contemporaneo-l118596.jpg}
}