Pipin Setyo Utomo, & Zaim Mukaffi. (2020). Effort Of Improving The Quality Of Employee’s Performance : (Studi On Sosgul Malang). At-Tahdzib: Jurnal Studi Islam Dan Muamalah, 8(2), 114-130. https://ejournal.staiat-tahdzib.ac.id/index.php/tahdzib/article/view/119