@book{3304,
	author = {Ehrenberg, Ronald G. and Smith, Robert S.},
	title = {Modern labor economics},
	publisher = {Prentice Hall},
	year = {2012},
	address = {Boston :},
	edition = {11a. ed},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/L126236.jpg}
}