Bataller, J. A. ., G. P. . Baladiang, R. M. . Montesa, J. L. . Sagun, J. M. . Sabanal, and A. A. . Tandoc, Maed. “Status of Instructional Materials at San Bartolome Elementary School at Primary Level”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 1, no. 1, Apr. 2019, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/1205.