Offemaria, R. (1999). Potable water: The world's most precious commodity. Manila Times.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOffemaria, Rodel. "Potable Water: The World's Most Precious Commodity." Manila Times 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOffemaria, Rodel. "Potable Water: The World's Most Precious Commodity." Manila Times, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.