(1997). The GSIS today. Manila Chronicle.
Lua i Stíl Chicago (17ú heag.)"The GSIS Today." Manila Chronicle 1997.
Lua MLA (9ú heag.)"The GSIS Today." Manila Chronicle, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.