Matias, B. M. (1998). The inducting officer and guest speaker. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMatias, Ben-Oliver M. "The Inducting Officer and Guest Speaker." Manila Bulletin 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMatias, Ben-Oliver M. "The Inducting Officer and Guest Speaker." Manila Bulletin, 1998.
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