Pipin Setyo Utomo, and Zaim Mukaffi. “Effort Of Improving The Quality Of Employee’s Performance : (Studi On Sosgul Malang)”. At-Tahdzib: Jurnal Studi Islam dan Muamalah 8, no. 2 (November 1, 2020): 114–130. Accessed July 21, 2026. https://ejournal.staiat-tahdzib.ac.id/index.php/tahdzib/article/view/119.