World Health Organization. (1997). Determination of airborne fibre number concentrations. World Health Organization.
Chicago-referens (17:e uppl.)World Health Organization. Determination of Airborne Fibre Number Concentrations. Geneva: World Health Organization, 1997.
MLA-referens (8:e uppl.)World Health Organization. Determination of Airborne Fibre Number Concentrations. World Health Organization, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.