Terminio, E. B. (1997). 4,000 GSIS workers walk out of their jobs. Manila Chronicle.
Lua i Stíl Chicago (17ú heag.)Terminio, Elna B. "4,000 GSIS Workers Walk Out of Their Jobs." Manila Chronicle 1997.
Lua MLA (9ú heag.)Terminio, Elna B. "4,000 GSIS Workers Walk Out of Their Jobs." Manila Chronicle, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.