Lee, ChulHee, KangHyun Shin, and Changgoo Heo. “The Effect of Transformational Leadership and Transactional Leadership on Work Engagement: The Mediating Effect of Psychological Capital”. Korean Journal of Industrial and Organizational Psychology 25, no. 1 (February 28, 2012): 147–169. Accessed April 27, 2024. https://journal.ksiop.or.kr/index.php/KJIOP/article/view/277.