UDIN, UDIN, FITRIAH M. SUUD, and AZZUHRATUL KHAIRA FIRDAUSI. 2021. “Transformational Leadership Training: A Key Driver to Improve the Effectiveness and Productivity of CV Ning Sri Stone Crusher”. The Journal of Contemporary Issues in Business and Government 27 (2):5821-29. https://cibgp.com/au/index.php/1323-6903/article/view/1478.