Sinambela, M., Butar-butar, G.M., Tamba, T. and Series, A. 2022. Optimization of the Christian Leadership Training of Trainer Handbook: Efforts to Achieve Graduate Profiles. EDUKASIA: Jurnal Pendidikan dan Pembelajaran. 3, 3 (Nov. 2022), 873-880. DOI:https://doi.org/10.62775/edukasia.v3i3.210.