Não informado. (2004). Environmental Pollution. Elsevier Applied Science.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Pollution. Barking, Inglaterra: Elsevier Applied Science, 2004.
Lua MLA (8ú heag.)Não informado. Environmental Pollution. Elsevier Applied Science, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.