Walker, R. (1978). Water supply, treatment, and distribution. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalker, Rodger. Water Supply, Treatment, and Distribution. Englewood cliffs, N. J: Prentice-Hall, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWalker, Rodger. Water Supply, Treatment, and Distribution. Prentice-Hall, 1978.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.