Não informado. (1948). Demographic Yearbook. United Nations, Department of Economic and Social Affairs, Statistical Office.
Chicago-referens (17:e uppl.)Não informado. Demographic Yearbook. New York: United Nations, Department of Economic and Social Affairs, Statistical Office, 1948.
MLA-referens (8:e uppl.)Não informado. Demographic Yearbook. United Nations, Department of Economic and Social Affairs, Statistical Office, 1948.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.