B. S. Utomo, “Guru sebagai Formator Spiritual dalam Perspektif Perjanjian Lama dan Implikasinya bagi Pendidikan Agama Kristen [Teachers as Spiritual Formators from the Old Testament Perspective and Its Implications for Christian Religious Education]”, DILIGENTIA, vol. 8, no. 2, pp. 187–204, May 2026.