Suriani, C., Fadillah, Y. R., & Kairani, A. (2025). THE RELATIONSHIP BETWEEN 21ST CENTURY SKILLS AND STUDENT LEARNING OUTCOMES THROUGH THE APPLICATION OF PROBLEM BASED LEARNING MODELS IN CLASS X ENVIRONMENTAL CHANGE MATERIALS AT SMA NEGERI 5 MEDAN T.P 2023/2024. Jurnal Pelita Pendidikan, 13(1), 20–28. Diambil dari https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/67193