PURWANTO, Wahyu; BALASAD, Najibah; ARDIANTO, Ries; LESTARI, Puji. PENGARUH KEBIASAAN TIDUR TERHADAP FOKUS BELAJAR SISWA: TIDUR AWAL VS. BEGADANG. Jurnal Lingkar Mutu Pendidikan, [S. l.], v. 22, n. 1, p. 1–7, 2025. DOI: 10.54124/jlmp.v22i1.160. Disponível em: https://jlmp.kemdikbud.go.id/index.php/jlmp/article/view/160. Acesso em: 17 mei. 2026.