Berta Masrifa Panggabean, Marni Anggi Sigalingging, Mariati Purnama Simanjuntak. Pengaruh Project-Based Learning (PJBL) Berbasis Stem Terhadap Kemampuan Pemecahan Masalah Siswa SMA : Penelitian. JERKIN [Internet]. 2025 Dec. 5 [cited 2026 Jul. 6];4(2):12146-53. Available from: https://jerkin.org/index.php/jerkin/article/view/3989