Twort, A. C. (1994). Water supply (4th ed.). Edward Arnold.
Chicago Style aipamenaTwort, A. C. Water Supply. 4th ed. London: Edward Arnold, 1994.
MLA aipamenaTwort, A. C. Water Supply. 4th ed. Edward Arnold, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.