Perez, D. (1999). Steel firm was bound to fail. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)Perez, Delfin. "Steel Firm Was Bound to Fail." Manila Bulletin 1999.
Citatione MLA (9a ed.)Perez, Delfin. "Steel Firm Was Bound to Fail." Manila Bulletin, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.