Não informado. (1969). British water supply. British Waterworks Association.
Lua i Stíl Chicago (17ú heag.)Não informado. British Water Supply. London: British Waterworks Association, 1969.
Lua MLA (8ú heag.)Não informado. British Water Supply. British Waterworks Association, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.