(1997). Industrial ecowatch: DENR's new compliance monitoring system. Manila Times.
芝加哥风格引文"Industrial Ecowatch: DENR's New Compliance Monitoring System." Manila Times 1997.
MLA引文"Industrial Ecowatch: DENR's New Compliance Monitoring System." Manila Times, 1997.
警告：这些引文格式不一定是100％准确.