Villanueva, M. A., & Diaz, J. (1997). Ramos on Charter change: No chance. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Villanueva, Marichu A., agus Jess Diaz. "Ramos on Charter Change: No Chance." Philippine Star 1997.
Lua MLA (9ú heag.)Villanueva, Marichu A., agus Jess Diaz. "Ramos on Charter Change: No Chance." Philippine Star, 1997.
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