@book{278500,
	author = {Scarano, Francisco A. and Huertas González, Félix R.},
	title = {Puerto Rico :},
	publisher = {McGraw-Hill,},
	year = {c2015.},
	address = {México :},
	edition = {Cuarta Edición},
	url = {https://elibro.net/en/lc/pucpr/titulos/93526}
}