Não informado. (1977). World cement technology. Cement and Concrete Association.
Lua i Stíl Chicago (17ú heag.)Não informado. World Cement Technology. London: Cement and Concrete Association, 1977.
Lua MLA (8ú heag.)Não informado. World Cement Technology. Cement and Concrete Association, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.