Offemaria, R. (1999). Potable water: The world's most precious commodity. Manila Times.
芝加哥风格引文Offemaria, Rodel. "Potable Water: The World's Most Precious Commodity." Manila Times 1999.
MLA引文Offemaria, Rodel. "Potable Water: The World's Most Precious Commodity." Manila Times, 1999.
警告：这些引文格式不一定是100％准确.