Não informado. Natural Resources & Energy. United Nations, Department of Technical Cooperation for Development.
Lua i Stíl Chicago (17ú heag.)Não informado. Natural Resources & Energy. New York: United Nations, Department of Technical Cooperation for Development.
Lua MLA (8ú heag.)Não informado. Natural Resources & Energy. United Nations, Department of Technical Cooperation for Development.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.