Badaruddin, Kemas, et al. “Colonial Regulation on Education Management of Christianity in Indonesia Before Ethical Policy Period”. Improvement: Jurnal Ilmiah Untuk Peningkatan Mutu Manajemen Pendidikan, vol. 11, no. 2, Dec. 2024, pp. 257-6, doi:10.21009/improvement.v11i2.51314.