IMPLIKASI PROJECT BASED LEARNING (PjBL) TERHADAP PENINGKATAN KEMANDIRIAN DAN MOTIVASI BELAJAR SISWA DI KELAS XI SMK NEGERI 4 MEDAN. JSSR [Internet]. 2026 Jun. 14 [cited 2026 Jul. 17];9(3):3617-24. Available from: https://jurnal.goretanpena.com/index.php/JSSR/article/view/6480