Não informado. (1939). Journal of the Institute of Petroleum. Institute of Petroleum.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of the Institute of Petroleum. London: Institute of Petroleum, 1939.
Lua MLA (8ú heag.)Não informado. Journal of the Institute of Petroleum. Institute of Petroleum, 1939.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.