Twort, A. C., Brandt, M. J., & Ratnayaka, D. D. (2000). Water supply (5th ed.). Arnold/IWA Pub..
Lua i Stíl Chicago (17ú heag.)Twort, A. C., Malcolm J. Brandt, agus Don D. Ratnayaka. Water Supply. 5th ed. London: Arnold/IWA Pub., 2000.
Lua MLA (9ú heag.)Twort, A. C., et al. Water Supply. 5th ed. Arnold/IWA Pub., 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.