Hassan, Mahamat Boukhari, and Mahamat Bachar Al-Catib. β€œThe Impact of Planning on Developing Human Resources Performance - An Applied Study on Al-Manna Trading, Investment, Contracting and Building Company 2020 –”. Journal of Economic, Administrative and Legal Sciences 5, no. 2 (January 30, 2021): 118–103. Accessed January 16, 2026. https://journals.ajsrp.com/index.php/jeals/article/view/3230.