(1997). Implementing rules and regulations of the government service insurance system act of 1997. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin, 1997.
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