Sinambela, Maringan, Grecetinovitria Merliana Butar-butar, Tiffany Tamba, and Antonius Series. 2022. “Optimization of the Christian Leadership Training of Trainer Handbook: Efforts to Achieve Graduate Profiles”. EDUKASIA: Jurnal Pendidikan Dan Pembelajaran 3 (3), 873-80. https://doi.org/10.62775/edukasia.v3i3.210.