Não informado. (1968). Journal of Physics. Institute of Physics.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Physics. London: Institute of Physics, 1968.
Lua MLA (8ú heag.)Não informado. Journal of Physics. Institute of Physics, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.