Não informado. (1965). Water and pollution control. Southam Business Publications.
Lua i Stíl Chicago (17ú heag.)Não informado. Water and Pollution Control. Don Mills, Canada: Southam Business Publications, 1965.
Lua MLA (8ú heag.)Não informado. Water and Pollution Control. Southam Business Publications, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.