PURBA, Sudiarjo. Joyfull Learning pada Pembelajaran Pendidikan Agama Kristen Kelas 1 SD. Jurnal Apokalupsis, [S. l.], v. 16, n. 1, p. 57–69, 2025. DOI: 10.52849/apokalupsis.v16i1.343. Disponível em: http://www.ojs.hits.ac.id/index.php/OJS/article/view/343. Acesso em: 15 feb. 2026.