1.
Sihombing R. APPLICATION OF THE PROBLEM BASED INSTRUCTION (PBI) LEARNING MODEL ON TUBE MATERIALS TO IMPROVE STUDENT LEARNING OUTCOMES. Afore [Internet]. 2023Oct.20 [cited 2025Jul.27];2(2):115-27. Available from: https://jurnal.uniraya.ac.id/index.php/Afore/article/view/1135