(1999). GSIS launches mutual fund, open to members and the public. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"GSIS Launches Mutual Fund, Open to Members and the Public." Manila Bulletin 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"GSIS Launches Mutual Fund, Open to Members and the Public." Manila Bulletin, 1999.
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