Não informado. (1999). Minerals & Energy: Raw materials report. Scandinavian University Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Minerals & Energy: Raw Materials Report. Stockholm: Scandinavian University Press, 1999.
Lua MLA (8ú heag.)Não informado. Minerals & Energy: Raw Materials Report. Scandinavian University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.