Novita Indah Sari AML. Principal’s Charismatic Leadership and Teacher’s Self Concept In Improving Teacher’s Work Ethic. Int. j. soc. sci. humanit. invent. [Internet]. 2017 Feb. 15 [cited 2024 May 4];4(2). Available from: http://valleyinternational.net/index.php/theijsshi/article/view/742