Matias, B. M. (1999). Post modernization in full gear as PPA turns silver. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMatias, Ben-Oliver M. "Post Modernization in Full Gear as PPA Turns Silver." Manila Bulletin 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMatias, Ben-Oliver M. "Post Modernization in Full Gear as PPA Turns Silver." Manila Bulletin, 1999.
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