Não informado. (1987). Journal of the Institution of Water and Environmental Management. Institution of Water and Environmental Management.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Institution of Water and Environmental Management. London: Institution of Water and Environmental Management, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Institution of Water and Environmental Management. Institution of Water and Environmental Management, 1987.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.