(2001). GMA appoints David as new CSC chair. Civil Service Reporter.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"GMA Appoints David as New CSC Chair." Civil Service Reporter 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"GMA Appoints David as New CSC Chair." Civil Service Reporter, 2001.
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