Não informado. (1978). International petroleum times. IPC Industrial Press.
Lua i Stíl Chicago (17ú heag.)Não informado. International Petroleum Times. London: IPC Industrial Press, 1978.
Lua MLA (8ú heag.)Não informado. International Petroleum Times. IPC Industrial Press, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.