Não informado. (1991). Environment watch. Cutter Information.
Lua i Stíl Chicago (17ú heag.)Não informado. Environment Watch. Arlington, Mass: Cutter Information, 1991.
Lua MLA (8ú heag.)Não informado. Environment Watch. Cutter Information, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.