Não informado. (1971). IEEE Power Engineering Society. Institute of Electrical and Electronics Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. IEEE Power Engineering Society. New York: Institute of Electrical and Electronics Engineers, 1971.
Lua MLA (8ú heag.)Não informado. IEEE Power Engineering Society. Institute of Electrical and Electronics Engineers, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.