Wibowo, U. B., Wijayanti, W., Abdul Jabar, C. S., Utari, R., & Rahmat, B. (2021). Can Strengthening Training for School Principals Improve Their Performance? Udik Budi Wibowo, Wiwik Wijayanti, Cepi Safruddin Abdul Jabar, R. KnE Social Sciences, 6(2), 612–620. https://doi.org/10.18502/kss.v6i2.10019