Não informado. (1964). Labour Education. International Labour Office.
Chicagoスタイル(17版)引用形式Não informado. Labour Education. Geneva, Suíça: International Labour Office, 1964.
MLA(8版)引用形式Não informado. Labour Education. International Labour Office, 1964.
警告: この引用は必ずしも正確ではありません.