Simarmata, Baringin Tirta, Hotner Tampubolon, and Said Hutagaol. “PENATALAYANAN GEREJA DALAM BIDANG PENDIDIKAN”. Jurnal Manajemen Pendidikan 9, no. 1 (January 6, 2020): 33 - 38. Accessed June 29, 2022. http://ejournal.uki.ac.id/index.php/jmp/article/view/3010.