Não informado. (1976). Important for the Future. United Nations, Institute for Training and Research.
Chicago-referens (17:e uppl.)Não informado. Important for the Future. New York: United Nations, Institute for Training and Research, 1976.
MLA-referens (8:e uppl.)Não informado. Important for the Future. United Nations, Institute for Training and Research, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.