Villa, R. L. (2002). Guingona returns as President of ruling Lakas party. Manila Bulletin.
Chicagoスタイル(17版)引用形式Villa, Rod L. "Guingona Returns as President of Ruling Lakas Party." Manila Bulletin 2002.
MLA(9版)引用形式Villa, Rod L. "Guingona Returns as President of Ruling Lakas Party." Manila Bulletin, 2002.
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