Não informado. (2009). Water & Wastewater Treatment. Faversham House Group.
Lua i Stíl Chicago (17ú heag.)Não informado. Water & Wastewater Treatment. London: Faversham House Group, 2009.
Lua MLA (8ú heag.)Não informado. Water & Wastewater Treatment. Faversham House Group, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.