(1997). Implementing rules and regulations of the government service insurance system act of 1997. Manila Bulletin.
Chicago-referens (17:e uppl.)"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin 1997.
MLA-referens (9:e uppl.)"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Manila Bulletin, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.