DAMELINA BASAULI TAMBUNAN; DENPHARANTO AGUNG KRISPRIMANDOYO; WENDRA HARTONO. Peningkatan Kompetensi Guru Sekolah Minggu di Lingkungan Gereja HKBP Resort Surabaya Selatan. Jurnal Leverage, Engagement, Empowerment of Community (LeECOM), [S. l.], v. 6, n. 1, 2024. DOI: 10.37715/leecom.v6i1.4427. Disponível em: https://ojs.somebut.my.id/index.php/LeECOM/article/view/4427. Acesso em: 19 feb. 2026.