Sionil, F. C. (2002). GSIS quarter profits up from P15.31B to P21.75B. Manila Bulletin.
Chicago (17e ed.) BronvermeldingSionil, Fil C. "GSIS Quarter Profits Up from P15.31B to P21.75B." Manila Bulletin 2002.
MLA (9e ed.) BronvermeldingSionil, Fil C. "GSIS Quarter Profits Up from P15.31B to P21.75B." Manila Bulletin, 2002.
Let op: Deze citaties zijn niet altijd 100% accuraat.