(2000). GSIS at 63: Member-focused, challenge oriented. Philippine Star.
Lua i Stíl Chicago (17ú heag.)"GSIS at 63: Member-focused, Challenge Oriented." Philippine Star 2000.
Lua MLA (9ú heag.)"GSIS at 63: Member-focused, Challenge Oriented." Philippine Star, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.