Santiago, C. J., M. L. Ulanday, Z. J. Centeno, M. C. Bayla, and J. Callanta. “Flexible Learning Adaptabilities in the New Normal: E-Learning Resources, Digital Meeting Platforms, Online Learning Systems and Learning Engagement”. Asian Journal of Distance Education, Vol. 16, no. 2, Dec. 2021, http://asianjde.com/ojs/index.php/AsianJDE/article/view/580.