Isla, P. A. A. (2004). Peak-hour electricity use to get more costly. Manila Times.
芝加哥风格引文Isla, Paul Anthony A. "Peak-hour Electricity Use to Get More Costly." Manila Times 2004.
MLA引文Isla, Paul Anthony A. "Peak-hour Electricity Use to Get More Costly." Manila Times, 2004.
警告：这些引文格式不一定是100％准确.