Nina Mardiana, Saptina Retnawati. The Impact of the Problem-Based Learning Model with Digital Student Worksheets on Student Learning Outcome at SMA PGRI Rumpin. IJEER [Internet]. 2025 Oct. 8 [cited 2026 Jan. 14];6(2):1-10. Available from: https://openjournal.unpam.ac.id/index.php/IJEER/article/view/53883