Dwi Novita R, Tien Aminatun, Rihab Wit Daryono. E-Modules Through Flipped Classroom and PBL Models on Environmental Pollution Material to Increase Problem-Solving Ability. J. Educ. Technol. [Internet]. 2022 Dec. 14 [cited 2024 May 6];6(4):744-5. Available from: https://ejournal.undiksha.ac.id/index.php/JET/article/view/51656