Não informado. Progress in Standardization. World Health Organization.
Lua i Stíl Chicago (17ú heag.)Não informado. Progress in Standardization. Geneva, Suíça: World Health Organization.
Lua MLA (8ú heag.)Não informado. Progress in Standardization. World Health Organization.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.