Laksmi, Putu Satya Wadi, Putu Kerti Nitiasih, and Luh Gede Eka Wahyuni. 2024. “Development Problem Based Learning Activities to Enhance Students Engagement in Class VII”. Journal of Educational Study 4 (2):219-23. http://jurnal.stkipahsingaraja.ac.id/index.php/joes/article/view/1077.