Laksmi PSW, Nitiasih PK, Wahyuni LGE. Development Problem Based Learning Activities to Enhance Students Engagement in Class VII. JoES [Internet]. 2024 Dec. 30 [cited 2026 Mar. 3];4(2):219-23. Available from: https://stkipahsingaraja.ac.id/jurnal/index.php/joes/article/view/1077