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Lua i Stíl Chicago (17ú heag.)Aning, Jerome. "Powell: Ople Was a Pivotal Figure in RP History." Philippine Daily Inquirer 2003.
Lua MLA (9ú heag.)Aning, Jerome. "Powell: Ople Was a Pivotal Figure in RP History." Philippine Daily Inquirer, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.