Não informado. (1953). Northeast Africa series. American University Field Staff.
Chicago-referens (17:e uppl.)Não informado. Northeast Africa Series. New York: American University Field Staff, 1953.
MLA-referens (8:e uppl.)Não informado. Northeast Africa Series. American University Field Staff, 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.