Egbon, Thomastina Nkechi, Onofere Princewill Okereka, and Akpomuvire Mukoro. “Performance Appraisal Systems and Employee Motivation in Selected Ministries in Delta and Rivers States, Nigeria”. Journal of Social Science and Humanities 1, no. 1 (October 6, 2025): 83–103. Accessed March 4, 2026. https://journal.jcopublishing.com/index.php/jssh/article/view/715.