@book{267719,
	author = {United States.},
	title = {Tarjetas de educación cívica para el examen de naturalizacíon /},
	publisher = {U.S. Dept. of Homeland Security, U.S. Citizenship and Immigration Services :},
	year = {[2017]},
	address = {[Washington, D.C.] :},
	edition = {Revised.},
	note = {"M-623-S (rev. 05/17)."},
	url = {https://www.uscis.gov/sites/default/files/USCIS/files/M-623-S_red_slides.pdf}
}