Theofilus M, Siagian RJ. The Influence of Dalihan Na Tolu Philosophy as A Batak Moral System on the Implementation of Christian Character from Sahala’s Perspective. PJTPAK [Internet]. 2026May31 [cited 2026Jun.1];22(1):28-41. Available from: https://journal.stbi.ac.id/index.php/PSC/article/view/571