United Nations. Statistical Office. (1979). World energy supplies, 1973-1978. United Nations.
Lua i Stíl Chicago (17ú heag.)United Nations. Statistical Office. World Energy Supplies, 1973-1978. New York: United Nations, 1979.
Lua MLA (8ú heag.)United Nations. Statistical Office. World Energy Supplies, 1973-1978. United Nations, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.