Nurtjahjani, Fullchis, et al. “Effect of Transformational Leadership on Work Engagement As Mediated by Educator Motivation”. The International Journal of Social Sciences World (TIJOSSW), vol. 4, no. 1, June 2022, pp. 260-71, https://www.growingscholar.org/journal/index.php/TIJOSSW/article/view/186.