Tuazon, B. P. (2000). Estrada stops DOT duty-free franchises. Manila Bulletin.
Cita Chicago (17th ed.)Tuazon, Brenda P. "Estrada Stops DOT Duty-free Franchises." Manila Bulletin 2000.
Cita MLA (9th ed.)Tuazon, Brenda P. "Estrada Stops DOT Duty-free Franchises." Manila Bulletin, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.