@book{241781,
	author = {United States},
	title = {The 20th anniversary of the Tiananmen Square protests},
	publisher = {U.S. G.P.O.},
	year = {2009.},
	address = {Washington},
	note = {Shipping list no.: 2010-0056-P.},
	url = {http://purl.access.gpo.gov/GPO/LPS117393}
}