Não informado. (1971). Environmental data service. Environmental Data Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Data Service. Rockville, Md: Environmental Data Service, 1971.
Lua MLA (8ú heag.)Não informado. Environmental Data Service. Environmental Data Service, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.