Wibowo, U.B., Wijayanti, W., Abdul Jabar, C.S. , Utari, R. and 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 (Dec. 2021), 612–620. DOI:https://doi.org/10.18502/kss.v6i2.10019.