Não informado. (1987). Safety and health at work. International Occupational Safety and Health Information Centre.
Chicagoスタイル(17版)引用形式Não informado. Safety and Health at Work. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1987.
MLA(8版)引用形式Não informado. Safety and Health at Work. International Occupational Safety and Health Information Centre, 1987.
警告: この引用は必ずしも正確ではありません.