Laraga, Mary Claire, et al. “Impacts of Handwritten Instructional Materials on Teaching Physical Science and Improving Academic Performance: An Assessment of Grade 12 HUMSS Strand Students in BCP”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 2, no. 1, Apr. 2020, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/2537.