Ahmad, Ibrahim, et al. “LEADERSHIP, COMMITMENT AND WORK CULTURE : THEIR IMPACT ON EMPLOYEE PRODUCTIVITY ”. JPIM (Jurnal Penelitian Ilmu Manajemen), vol. 8, no. 3, Oct. 2023, pp. 455-73, https://jurnalekonomi.unisla.ac.id/index.php/jpim/article/view/1801.