Não informado. (1987). Safety and health at work. International Occupational Safety and Health Information Centre.
Citação do estilo Chicago (17ª ed.)Não informado. Safety and Health at Work. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1987.
Citação MLA (8ª ed.)Não informado. Safety and Health at Work. International Occupational Safety and Health Information Centre, 1987.
警告：这些引文格式不一定是100％准确.