Não informado. (1957). Copper. Copper Development Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Copper. London: Copper Development Association, 1957.
Lua MLA (8ú heag.)Não informado. Copper. Copper Development Association, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.