PENGARUH MODEL PROJECT BASED LEARNING (PJBL) TERHADAP HASIL BELAJAR DAN AKTIVITAS SISWA PADA MATERI SISTEM PEREDARAN DARAH KELAS VIII DI UPTD SMP NEGERI 1 PEMATANGSIANTAR. JOURNAL OF SCIENCE AND SOCIAL RESEARCH, [S. l.], v. 8, n. 4, p. 5578–5584, 2025. DOI: 10.54314/jssr.v8i4.5251. Disponível em: https://jurnal.goretanpena.com/index.php/JSSR/article/view/5251.. Acesso em: 3 may. 2026.