Pitchaiah, P. S. (1991). Water ecology pollution and management. Chugh Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPitchaiah, P. Sankara. Water Ecology Pollution and Management. Allahabad: Chugh Publications, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPitchaiah, P. Sankara. Water Ecology Pollution and Management. Chugh Publications, 1991.
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