APA (7 वां संस्करण) प्रशस्ति पत्र

(1997). Preserving the country's water resources. IN Editorial [column]. Manila Bulletin.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

"Preserving the Country's Water Resources. IN Editorial [column]." Manila Bulletin 1997.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

"Preserving the Country's Water Resources. IN Editorial [column]." Manila Bulletin, 1997.