APA (7th ed.) Citation

Twort, A., Crowley F.W, & Ratnayaka, D. (1994). Water supply (4th ed.). Edward Anold.

Chicago Style (17th ed.) Citation

Twort, A.C, Crowley F.W, and D.D Ratnayaka. Water Supply. 4th ed. London: Edward Anold, 1994.

MLA (9th ed.) Citation

Twort, A.C, et al. Water Supply. 4th ed. Edward Anold, 1994.