(1997). Implementing rules and regulations of the government service insurance system act of 1997. Manila Bulletin.
Chicagoスタイル(17版)引用形式"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin 1997.
MLA(9版)引用形式"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin, 1997.
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