Não informado. (1989). International Journal of Refractory Metals & Hard Materials. Elsevier Applied Science.
Lua i Stíl Chicago (17ú heag.)Não informado. International Journal of Refractory Metals & Hard Materials. Oxford, Inglaterra: Elsevier Applied Science, 1989.
Lua MLA (8ú heag.)Não informado. International Journal of Refractory Metals & Hard Materials. Elsevier Applied Science, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.