Rahmat, Ihsan, Bayu Mitra A. Kusuma, Ashadi Cahyadi, and Anis Handayani. “Early Islam Compensation: Pattern from Umar’s Caliphate and Learning for Human Resources Management”. International Journal of Economics, Management and Accounting 31, no. 1 (June 28, 2023): 205–217. Accessed May 17, 2024. https://journals.iium.edu.my/enmjournal/index.php/enmj/article/view/1152.