Maliyana J, Rahayu P. Validitas LKPD Berbasis Problem Based Learning (PBL) pada Materi Statistika Siswa Kelas VIII SMP. Tematik [Internet]. 2023 Jul. 22 [cited 2025 Jul. 30];1(2):59-67. Available from: https://ejournal.unzah.ac.id/index.php/jkpm/article/view/1188