Não informado. (1980). Environmental Pollution. Applied Science Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Pollution. London: Applied Science Publishers, 1980.
Lua MLA (8ú heag.)Não informado. Environmental Pollution. Applied Science Publishers, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.