Aning, J. (2003). Powell: Ople was a pivotal figure in RP history. Philippine Daily Inquirer.
Chicago-referens (17:e uppl.)Aning, Jerome. "Powell: Ople Was a Pivotal Figure in RP History." Philippine Daily Inquirer 2003.
MLA-referens (9:e uppl.)Aning, Jerome. "Powell: Ople Was a Pivotal Figure in RP History." Philippine Daily Inquirer, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.