Villanueva, M. A. (1999). Erap appoints new presidential assistant on political affairs. Philippine Star.
Chicago-referens (17:e uppl.)Villanueva, Marichu A. "Erap Appoints New Presidential Assistant on Political Affairs." Philippine Star 1999.
MLA-referens (9:e uppl.)Villanueva, Marichu A. "Erap Appoints New Presidential Assistant on Political Affairs." Philippine Star, 1999.
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