Villanueva, M. A. (2003). Hike in contributiions mulled to shore up troubled GSIS. Philippine Star.
Chicago Style (17. basım) AtıfVillanueva, Marichu A. "Hike in Contributiions Mulled to Shore Up Troubled GSIS." Philippine Star 2003.
MLA (9th ed.) AtıfVillanueva, Marichu A. "Hike in Contributiions Mulled to Shore Up Troubled GSIS." Philippine Star, 2003.
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