Não informado. (1985). National safety and health news. National Safety Council.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. National Safety and Health News. Chicago, Ill: National Safety Council, 1985.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. National Safety and Health News. National Safety Council, 1985.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.