Cahiles, B. A. (1998). MRT line 4 cost upgraded by 40%. Manila Bulletin.
Cita Chicago (17th ed.)Cahiles, Bernie A. "MRT Line 4 Cost Upgraded by 40%." Manila Bulletin 1998.
Cita MLA (9th ed.)Cahiles, Bernie A. "MRT Line 4 Cost Upgraded by 40%." Manila Bulletin, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.