Ople, B. F. (2002). Pananagutan ng Ports Authority. IN Dilim at liwanag [column]. Kabayan.
Cita Chicago (17th ed.)Ople, Blas F. "Pananagutan Ng Ports Authority. IN Dilim at Liwanag [column]." Kabayan 2002.
Cita MLA (9th ed.)Ople, Blas F. "Pananagutan Ng Ports Authority. IN Dilim at Liwanag [column]." Kabayan, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.