World Health Organization & United nations Environment Programme. (1991). IPCS: Environmental health criteria 125 platinum. World Health Organization.
Cita Chicago (17th ed.)World Health Organization i United nations Environment Programme. IPCS: Environmental Health Criteria 125 Platinum. Geneva: World Health Organization, 1991.
Cita MLA (8th ed.)World Health Organization i United nations Environment Programme. IPCS: Environmental Health Criteria 125 Platinum. World Health Organization, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.