Não informado. (1976). Energy information abstracts. Environment Information Center.
Lua i Stíl Chicago (17ú heag.)Não informado. Energy Information Abstracts. New York: Environment Information Center, 1976.
Lua MLA (8ú heag.)Não informado. Energy Information Abstracts. Environment Information Center, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.