Não informado. (1987). Journal of Cold Regions Engineering. American Society of Civil Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Cold Regions Engineering. New York: American Society of Civil Engineers, 1987.
Lua MLA (8ú heag.)Não informado. Journal of Cold Regions Engineering. American Society of Civil Engineers, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.