(2000). GSIS at 63: Member-focused, challenge oriented. Philippine Star.
Chicago Style (17. basım) Atıf"GSIS at 63: Member-focused, Challenge Oriented." Philippine Star 2000.
MLA (9th ed.) Atıf"GSIS at 63: Member-focused, Challenge Oriented." Philippine Star, 2000.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..