Sihombing, T., Sitio, R. J. T. ., Simatupang, H. ., & Simatupang, H. . (2023). The Influence of School Leader Leadership as Supervisor and Motivator on Teacher Performance . Indonesian Journal of Christian Education and Theology, 2(3), 279–294. https://doi.org/10.55927/ijcet.v2i3.6527