Villa, R. L. (2002). Guingona returns as President of ruling Lakas party. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Villa, Rod L. "Guingona Returns as President of Ruling Lakas Party." Manila Bulletin 2002.
Lua MLA (9ú heag.)Villa, Rod L. "Guingona Returns as President of Ruling Lakas Party." Manila Bulletin, 2002.
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