Permata, Silva Ayu Indah, Widha Sunarno, and Harlita Harlita. “The Effect of the Problem Based Learning and Double Loop Problem Solving Learning Models on Problem Solving Ability in Term of Creative Thinking on Environmental Pollution Material ”. Jurnal Penelitian Pendidikan IPA 8, no. 6 (December 28, 2022): 2647–2653. Accessed March 29, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/1996.