World Health Organization. (1997). Determination of airborne fibre number concentrations. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization. Determination of Airborne Fibre Number Concentrations. Geneva: World Health Organization, 1997.
Citatione MLA (8a ed.)World Health Organization. Determination of Airborne Fibre Number Concentrations. World Health Organization, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.