Medrano, Louie V. “Perceptions on Bullying of Pupils from Multigrade Elementary Schools in Mabini District: Basis for Drafting a Localized Policy”. International Journal of Research in Engineering, Science and Management, vol. 5, no. 5, June 2022, pp. 246-8, https://journal.ijresm.com/index.php/ijresm/article/view/2115.