Não informado. (1971). Environment information access. Environmental Information Center of Ecology Forum.
Lua i Stíl Chicago (17ú heag.)Não informado. Environment Information Access. New York: Environmental Information Center of Ecology Forum, 1971.
Lua MLA (8ú heag.)Não informado. Environment Information Access. Environmental Information Center of Ecology Forum, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.