(2001). Promoting call 117 as the country's efficient emergency dial system. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Promoting Call 117 as the Country's Efficient Emergency Dial System." Philippine Star 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Promoting Call 117 as the Country's Efficient Emergency Dial System." Philippine Star, 2001.
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