American Society of Civil Engineers. (1991). Journal of Professional Issues in Engineering Education and Practice. American Society of Civil Engineers.
Lua i Stíl Chicago (17ú heag.)American Society of Civil Engineers. Journal of Professional Issues in Engineering Education and Practice. New York: American Society of Civil Engineers, 1991.
Lua MLA (8ú heag.)American Society of Civil Engineers. Journal of Professional Issues in Engineering Education and Practice. American Society of Civil Engineers, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.