(1985). Clays: A chapter from Mineral facts and problems, 1985 edition.
Lua i Stíl Chicago (17ú heag.)Clays: A Chapter from Mineral Facts and Problems, 1985 Edition. 1985.
Lua MLA (9ú heag.)Clays: A Chapter from Mineral Facts and Problems, 1985 Edition. 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.