PHIRI, Charity; MAHLANGU, Lee Caleb. Assessing the Effect of Performance Management Systems on Operational Efficiency and Service Delivery at Eastern Water and Sanitation Company Limited (EWSC). East African Finance Journal, [S. l.], v. 4, n. 3, p. 48–61, 2025. DOI: 10.59413/eafj/v4.i3.3. Disponível em: https://ijcsacademia.com/index.php/eafj/article/view/286. Acesso em: 20 apr. 2026.