Opina, Ma. Fe D. “PTCA-Funded Public Preschools: Basis for Adopt-A-Preschool Program”. JPAIR Multidisciplinary Research 2, no. 1 (January 17, 2009): 17–29. Accessed July 8, 2025. https://ui.philair.ph/index.php/jpair/article/view/55.