Não informado. Annual report on child and youth welfare. United Nations, Department of Social Affairs.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Annual Report on Child and Youth Welfare. Geneva, Suíça: United Nations, Department of Social Affairs.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Annual Report on Child and Youth Welfare. United Nations, Department of Social Affairs.
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