Lestari, Sri, Totok Sumaryanto Florentinus, and I Made Sudana. “The Effect of Incentive, Principal Leadership, and Motivation Toward Teacher Professionalism in Conducting Learning Activity at Vocational High Schools”. Educational Management 8, no. 1 (February 21, 2019): 34-43. Accessed April 26, 2024. https://journal.unnes.ac.id/sju/eduman/article/view/29145.