@book{1123,
	author = {Drucker, Peter Ferdinand and Sierra, Julio A.},
	title = {El management del futuro},
	publisher = {Sudamericana},
	year = {2003},
	address = {Buenos Aires :},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/jcker-l87930.jpg}
}