Não informado. Annual report on child and youth welfare. United Nations, Department of Social Affairs.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Report on Child and Youth Welfare. Geneva, Suíça: United Nations, Department of Social Affairs.
Citação MLA (8ª ed.)Não informado. Annual Report on Child and Youth Welfare. United Nations, Department of Social Affairs.
警告：这些引文格式不一定是100％准确.