(1990). IPCS: Environmental health criteria 105. WHO.
Lua i Stíl Chicago (17ú heag.)IPCS: Environmental Health Criteria 105. Geneva: WHO, 1990.
Lua MLA (9ú heag.)IPCS: Environmental Health Criteria 105. WHO, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.