(2010). U.S.A. History in Brief. USA: Bureau of International Information Programs.
Trích dẫn kiểu ChicagoU.S.A. History in Brief. USA: Bureau of International Information Programs, 2010.
MLA引文U.S.A. History in Brief. USA: Bureau of International Information Programs, 2010.
警告:这些引文格式不一定是100%准确.