Não informado. (1968). Gold bulletin: Research on gold ant its applications in industry. International Gold Corporation.
Lua i Stíl Chicago (17ú heag.)Não informado. Gold Bulletin: Research on Gold Ant Its Applications in Industry. Marshalltown, Africa do Sul: International Gold Corporation, 1968.
Lua MLA (8ú heag.)Não informado. Gold Bulletin: Research on Gold Ant Its Applications in Industry. International Gold Corporation, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.