United States. Department of State. (1948). Economic cooperation series. [s.n.].
Chicago-referens (17:e uppl.)United States. Department of State. Economic Cooperation Series. Washington: [s.n.], 1948.
MLA-referens (9:e uppl.)United States. Department of State. Economic Cooperation Series. [s.n.], 1948.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.