Não informado. (1921). Digest. International General Electric Company.
Lua i Stíl Chicago (17ú heag.)Não informado. Digest. Schenectady, NY: International General Electric Company, 1921.
Lua MLA (8ú heag.)Não informado. Digest. International General Electric Company, 1921.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.