United States Information Agency. Research Service. Research note. U.S. Information Agency, Research Service.
Chicago-referens (17:e uppl.)United States Information Agency. Research Service. Research Note. [Washington, D.C.]: U.S. Information Agency, Research Service.
MLA-referens (8:e uppl.)United States Information Agency. Research Service. Research Note. U.S. Information Agency, Research Service.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.