Não informado. (1976). Important for the Future. United Nations, Institute for Training and Research.
Čikaški stil citiranja (17. izdanje)Não informado. Important for the Future. New York: United Nations, Institute for Training and Research, 1976.
MLA način citiranja (8. izdanje)Não informado. Important for the Future. United Nations, Institute for Training and Research, 1976.
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