Parungao, R., & Castro, B. (1997). Malacanang officials defend ID system. Manila Chronicle.
Cita Chicago (17th ed.)Parungao, Rhowena, i Bert Castro. "Malacanang Officials Defend ID System." Manila Chronicle 1997.
Cita MLA (9th ed.)Parungao, Rhowena, i Bert Castro. "Malacanang Officials Defend ID System." Manila Chronicle, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.