Nellitawati, Nellitawati. “Motivation and Innovation Role of school’s Principal in Improving Teacher Professionalism”. COUNS-EDU: The International Journal of Counseling and Education 3, no. 2 (May 26, 2018): 48–56. Accessed August 30, 2025. https://counsedu.iicet.org/index.php/counsedu/article/view/135.