Alvarez, H. T. (2003). DENR's new order a major setback vs RP's anti-air pollution drive. Philippine Star.
芝加哥风格引文Alvarez, Heherson T. "DENR's New Order a Major Setback Vs RP's Anti-air Pollution Drive." Philippine Star 2003.
MLA引文Alvarez, Heherson T. "DENR's New Order a Major Setback Vs RP's Anti-air Pollution Drive." Philippine Star, 2003.
警告：这些引文格式不一定是100％准确.