Não informado. (1979). Euro reports and studies. World Health Organization.
Chicagoスタイル(17版)引用形式Não informado. Euro Reports and Studies. Copenhagen: World Health Organization, 1979.
MLA(8版)引用形式Não informado. Euro Reports and Studies. World Health Organization, 1979.
警告: この引用は必ずしも正確ではありません.