Jesus, Dennis A. De, and Windel C. Austria. “TIPians’ Engagement in the Environmental Sustainability Campaigns of the Philippine Center For Environmental Protection and Sustainable Development (PCEPSDI): A Case Study in Quezon City”. International Journal of Atharva 4, no. 1 (March 31, 2026): 47–65. Accessed April 1, 2026. https://nepjol.info/index.php/ija/article/view/92372.