E. A. Telaumbanua, L. W. Augustiana, and D. Waruwu, “Occultism, Ancestral Traditions, and Faith Struggles among Banua Niha Keriso Protestan (BNKP) Congregations from the Perspective of Christian Religious Education Psychology”, JD, vol. 5, no. 2, p. 459–568, Aug. 2026.