Não informado. (1974). International Journal of Occupational Health and Safety. Medical Publications.
Chicago-referens (17:e uppl.)Não informado. International Journal of Occupational Health and Safety. Northbrook, Ill: Medical Publications, 1974.
MLA-referens (8:e uppl.)Não informado. International Journal of Occupational Health and Safety. Medical Publications, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.