Não informado. (1973). Job safety and health. Occupational Safety and Health Administration.
Citação do estilo Chicago (17ª ed.)Não informado. Job Safety and Health. Washington: Occupational Safety and Health Administration, 1973.
Citação MLA (8ª ed.)Não informado. Job Safety and Health. Occupational Safety and Health Administration, 1973.
警告：这些引文格式不一定是100％准确.