Amalya, Cut Putri, Wiwit Artika, Safrida Safrida, Cut Nurmaliah, Muhibbuddin Muhibbuddin, and M. Syukri. “Implementation of the Problem Base Learning Model Combined With E-STEM Based Student Worksheets on Learning Outcomes and Self Efficacy on Environmental Pollution Materials”. Jurnal Penelitian Pendidikan IPA 7, no. SpecialIssue (November 21, 2021): 37–38. Accessed July 4, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/962.