Amalya, C. P., Artika, W., Safrida, S., Nurmaliah, C., Muhibbuddin, M., & Syukri, M. (2021). 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(SpecialIssue), 37–38. https://doi.org/10.29303/jppipa.v7iSpecialIssue.962