(1997). Industrial ecowatch: DENR's new compliance monitoring system. Manila Times.
Čikaški stil citiranja (17. izdanje)"Industrial Ecowatch: DENR's New Compliance Monitoring System." Manila Times 1997.
MLA način citiranja (9. izdanje)"Industrial Ecowatch: DENR's New Compliance Monitoring System." Manila Times, 1997.
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