@book{230484,
	author = {U.S. Citizenship and Immigration Services.},
	title = {Learn about the United States},
	publisher = {U.S. Dept. of Homeland Security, U.S. Citizenship and Immigration Services},
	year = {[2012]},
	address = {[Washington, D.C.]},
	edition = {Rev. 07/12.},
	note = {Cover title.},
	url = {http://purl.fdlp.gov/GPO/gpo29665}
}