Filio, C. P. (1999). Erap's secretary of national offense. IN Commentary [column]. Philippine Daily Inquirer.
Chicago-referens (17:e uppl.)Filio, Candido P. "Erap's Secretary of National Offense. IN Commentary [column]." Philippine Daily Inquirer 1999.
MLA-referens (9:e uppl.)Filio, Candido P. "Erap's Secretary of National Offense. IN Commentary [column]." Philippine Daily Inquirer, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.