Não informado. (1978). Resources and energy. North Holland Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Resources and Energy. Amsterdam: North Holland Publishing, 1978.
Lua MLA (8ú heag.)Não informado. Resources and Energy. North Holland Publishing, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.