(1997). The GSIS today. Philippine Star.
Chicago Style aipamena"The GSIS Today." Philippine Star 1997.
MLA aipamena"The GSIS Today." Philippine Star, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(1997). The GSIS today. Philippine Star.
Chicago Style aipamena"The GSIS Today." Philippine Star 1997.
MLA aipamena"The GSIS Today." Philippine Star, 1997.