Rivera, John Rick, et al. “Advocacy on Reducing Paper Consumption of Grade 12 ABM Students Through 3R Process”. 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/1215.