(1997). Implementing rules and regulations of the Government Service Insurance System Act of 1997. Philippine Star.
Chicago-viite (17. p.)"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Philippine Star 1997.
MLA-viite (9. p.)"Implementing Rules and Regulations of the Government Service Insurance System Act of 1997." Philippine Star, 1997.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.