ISAAC AMPONG; CHIEF SUPT. FRANK ABROKWA. An Investigation into Performance Appraisal System as an Effective Tool for Motivation. Global Journal of Management and Business Research, [S. l.], v. 20, n. A16, p. 1–25, 2020. Disponível em: https://journalofbusiness.org/index.php/GJMBR/article/view/3274. Acesso em: 3 may. 2024.