Não informado. (1995). Environmental Engineering World. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Engineering World. New York: McGraw-Hill, 1995.
Lua MLA (8ú heag.)Não informado. Environmental Engineering World. McGraw-Hill, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.