(2000). Helicopter landing take-off area not covered by A.O. No. AGA 14.03, series of 1973. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Helicopter Landing Take-off Area Not Covered by A.O. No. AGA 14.03, Series of 1973." Philippine Star 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Helicopter Landing Take-off Area Not Covered by A.O. No. AGA 14.03, Series of 1973." Philippine Star, 2000.
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