(2007). PPA @ 33: Accelerating maritime trade through infrastructure and technology. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"PPA @ 33: Accelerating Maritime Trade Through Infrastructure and Technology." Philippine Star 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"PPA @ 33: Accelerating Maritime Trade Through Infrastructure and Technology." Philippine Star, 2007.
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