@book{215695,
	author = {United States},
	title = {El impuesto federal sobre los ingresos para personas físicas.},
	publisher = {Dept. of the Treasury, Internal Revenue Service},
	series = {Publicación},
	address = {[Washington, D.C.]},
	note = {Title from cover.},
	url = {http://www.irs.gov/pub/irs-pdf/p17sp.pdf}
}