Não informado. (1991). Structural Engineering International. International Association for Bridge and Structural Engineering.
Lua i Stíl Chicago (17ú heag.)Não informado. Structural Engineering International. Zurich, Suíça: International Association for Bridge and Structural Engineering, 1991.
Lua MLA (8ú heag.)Não informado. Structural Engineering International. International Association for Bridge and Structural Engineering, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.