OCTHIAN, S. G. A.; HURA, R. . Efficacy: Can It Improve Students’ Learning Achievement. Jurnal Pendidikan Agama Kristen (JUPAK), [S. l.], v. 5, n. 1, p. 13-24, 2024. DOI: 10.52489/jupak.v5i1.213. Disponível em: https://ejurnal.sttkadesiyogyakarta.ac.id/index.php/jupak/article/view/213. Acesso em: 24 jun. 2025.