Não informado. (1971). Information. Science Associates International.
Lua i Stíl Chicago (17ú heag.)Não informado. Information. New York: Science Associates International, 1971.
Lua MLA (8ú heag.)Não informado. Information. Science Associates International, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.