BINTANG ASTAMA, P.; MINSIH. Environment Based Ecosystem Thematic Teaching Materials: Using Problem Based Learning to Improve Learning Effectiveness. Journal for Lesson and Learning Studies, [S. l.], v. 6, n. 1, p. 63–70, 2023. DOI: 10.23887/jlls.v6i1.60742. Disponível em: https://ejournal.undiksha.ac.id/index.php/JLLS/article/view/60742. Acesso em: 1 jul. 2024.