Não informado. (1981). Basic Petroleum Data Book. American Petroleum Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Basic Petroleum Data Book. Washington: American Petroleum Institute, 1981.
Lua MLA (8ú heag.)Não informado. Basic Petroleum Data Book. American Petroleum Institute, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.