Tuazon, B. P. (2000). Estrada stops DOT duty-free franchises. Manila Bulletin.
Chicagoスタイル(17版)引用形式Tuazon, Brenda P. "Estrada Stops DOT Duty-free Franchises." Manila Bulletin 2000.
MLA(9版)引用形式Tuazon, Brenda P. "Estrada Stops DOT Duty-free Franchises." Manila Bulletin, 2000.
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