Não informado. (1976). Important for the Future. United Nations, Institute for Training and Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Important for the Future. New York: United Nations, Institute for Training and Research, 1976.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Important for the Future. United Nations, Institute for Training and Research, 1976.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.