Não informado. Petroleum & Petrochemical International. Petroleum Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Petroleum & Petrochemical International. London: Petroleum Publishing.
Lua MLA (8ú heag.)Não informado. Petroleum & Petrochemical International. Petroleum Publishing.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.