Aufa, M.N. et al. 2021. The Effect of Using e-module Model Problem Based Learning (PBL) Based on Wetland Environment on Critical Thinking Skills and Environmental Care Attitudes. Jurnal Penelitian Pendidikan IPA. 7, 3 (Jul. 2021), 401–407. DOI:https://doi.org/10.29303/jppipa.v7i3.732.