Não informado. (1987). Safety and health at work. International Occupational Safety and Health Information Centre.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Safety and Health at Work. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1987.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Safety and Health at Work. International Occupational Safety and Health Information Centre, 1987.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.