Jenks, W. Encyclopaedia of occupational health and safety. International Labour Office.
Chicago-referens (17:e uppl.)Jenks, Wilfred. Encyclopaedia of Occupational Health and Safety. Geneva: International Labour Office.
MLA-referens (9:e uppl.)Jenks, Wilfred. Encyclopaedia of Occupational Health and Safety. International Labour Office.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.