Villanueva, M. A., & Diaz, J. (1999). Estrada, Cory open to cha-cha compromise. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Villanueva, Marichu A., agus Jess Diaz. "Estrada, Cory Open to Cha-cha Compromise." Philippine Star 1999.
Lua MLA (9ú heag.)Villanueva, Marichu A., agus Jess Diaz. "Estrada, Cory Open to Cha-cha Compromise." Philippine Star, 1999.
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