Não informado. (1920). Journal of the A.I.E.E. American Institute of Electrical Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of the A.I.E.E. New York: American Institute of Electrical Engineers, 1920.
Lua MLA (8ú heag.)Não informado. Journal of the A.I.E.E. American Institute of Electrical Engineers, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.