(1999). UPM Chancellor to address 90th commencement exercises. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"UPM Chancellor to Address 90th Commencement Exercises." Philippine Star 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"UPM Chancellor to Address 90th Commencement Exercises." Philippine Star, 1999.
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