Não informado. (1961). Petroleum Intelligence Weekly. Petroleum Intellegence Weekly.
Lua i Stíl Chicago (17ú heag.)Não informado. Petroleum Intelligence Weekly. New York: Petroleum Intellegence Weekly, 1961.
Lua MLA (8ú heag.)Não informado. Petroleum Intelligence Weekly. Petroleum Intellegence Weekly, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.