Não informado. (1973). WHO Offset Publication. World Health Organization.
Lua i Stíl Chicago (17ú heag.)Não informado. WHO Offset Publication. Geneva, Suíça: World Health Organization, 1973.
Lua MLA (8ú heag.)Não informado. WHO Offset Publication. World Health Organization, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.