Não informado. (2019). Industrial Minerals. Industrial Minerals Information.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Minerals. London: Industrial Minerals Information, 2019.
Lua MLA (8ú heag.)Não informado. Industrial Minerals. Industrial Minerals Information, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.