Não informado. (1978). Energy resources and technology. Business Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Energy Resources and Technology. Silver Spring, Md: Business Publishers, 1978.
Lua MLA (8ú heag.)Não informado. Energy Resources and Technology. Business Publishers, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.