(2013). Outline of U.S. government. USA: Bureau of International Information Programs.
Trích dẫn kiểu ChicagoOutline of U.S. Government. USA: Bureau of International Information Programs, 2013.
MLA引文Outline of U.S. Government. USA: Bureau of International Information Programs, 2013.
警告:这些引文格式不一定是100%准确.