LUMBAN GAOL, Nasib Tua; SITINJAK, Tresia Ronestyka; HASUGIAN, Johanes Waldes. Efektivitas Kepemimpinan Kepala Sekolah Kristen di Masa Pandemi Covid-19. Regula Fidei : Jurnal Pendidikan Agama Kristen, [S. l.], v. 6, n. 2, p. 81–96, 2021. DOI: 10.33541/rfidei.v6i2.89. Disponível em: http://christianeducation.id/e-journal/index.php/regulafidei/article/view/89. Acesso em: 15 feb. 2026.