Não informado. (1987). International Journal of Surface Mining, Reclamation and Environment. Balkema.
Lua i Stíl Chicago (17ú heag.)Não informado. International Journal of Surface Mining, Reclamation and Environment. Rotterdam, Holanda: Balkema, 1987.
Lua MLA (8ú heag.)Não informado. International Journal of Surface Mining, Reclamation and Environment. Balkema, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.