Sionil, F. C. (2002). GSIS quarter profits up from P15.31B to P21.75B. Manila Bulletin.
Cita Chicago (17th ed.)Sionil, Fil C. "GSIS Quarter Profits Up from P15.31B to P21.75B." Manila Bulletin 2002.
Cita MLA (9th ed.)Sionil, Fil C. "GSIS Quarter Profits Up from P15.31B to P21.75B." Manila Bulletin, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.