Azhari, M., S. Z. Saragih, and A. Anjar. “The Influence of the Problem Based Learning (PBL) Learning Model on the Learning Outcomes of PPKN Students in Class X of Private High Schools Has Sepakat”. EDUCTUM: Journal Research, vol. 5, no. 2, Mar. 2026, pp. 228-36, doi:10.56495/ejr.v5i2.1518.