WIBOWO, U. B.; WIJAYANTI, W.; ABDUL JABAR, C. S.; UTARI, R.; RAHMAT, B. Can Strengthening Training for School Principals Improve Their Performance? Udik Budi Wibowo, Wiwik Wijayanti, Cepi Safruddin Abdul Jabar, R. KnE Social Sciences, v. 6, n. 2, p. 612–620, 29 Dec. 2021.