Não informado. (1987). Safety and health at work. International Occupational Safety and Health Information Centre.
Citace podle Chicago (17th ed.)Não informado. Safety and Health at Work. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1987.
Citace podle MLA (8th ed.)Não informado. Safety and Health at Work. International Occupational Safety and Health Information Centre, 1987.
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