Alvarez, H. T. (2003). DENR's new order a major setback vs RP's anti-air pollution drive. Philippine Star.
Cita Chicago (17th ed.)Alvarez, Heherson T. "DENR's New Order a Major Setback Vs RP's Anti-air Pollution Drive." Philippine Star 2003.
Cita MLA (9th ed.)Alvarez, Heherson T. "DENR's New Order a Major Setback Vs RP's Anti-air Pollution Drive." Philippine Star, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.