Hafnidar. “Meningkatkan Aktivitas Dan Hasil Belajar Siswa Pada Materi Sistem Gerak Melalui Pemanfaatan Model Discovery Learning”. Jurnal Kinerja Kependidikan (JKK): Facilities of Educator Career and Educational Scientific Information, vol. 1, no. 1, Aug. 2021, pp. 18-30, https://journalserambi.org/index.php/jkk/article/view/29.