(1997). Implementing rules and regulations of the government service insurance system act of 1997. Manila Bulletin.
Citace podle Chicago (17th ed.)"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin 1997.
Citace podle MLA (9th ed.)"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin, 1997.
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