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