Villa, R. L. (2002). Guingona returns as President of ruling Lakas party. Manila Bulletin.
Chicago Style (17. basım) AtıfVilla, Rod L. "Guingona Returns as President of Ruling Lakas Party." Manila Bulletin 2002.
MLA (9th ed.) AtıfVilla, Rod L. "Guingona Returns as President of Ruling Lakas Party." Manila Bulletin, 2002.
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