(1963). Vol. 61, № 51; OiL and Gas journal. 1963.
Lua i Stíl Chicago (17ú heag.)Vol. 61, № 51; OiL and Gas Journal. 1963, 1963.
Lua MLA (9ú heag.)Vol. 61, № 51; OiL and Gas Journal. 1963, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.