Kifta, Decky, Syaiful Islami, Nizwardi Jalinus, and Rijal Abdullah. “The Effects Of Leadership Style, Organizational Culture and Self-Concept on Trainers’ Performance at The Vocational Training Institutions”. Jurnal Pendidikan Teknologi Kejuruan 5, no. 1 (February 16, 2022): 8-14. Accessed May 13, 2024. http://jptk.ppj.unp.ac.id/index.php/jptk/article/view/224.