Service Speed, Staff Courtesy, and Customer Satisfaction in Supermarkets in Awka Metropolis: The Mediating Role of Perceived Service Quality. Nigerian Journal of Cooperative Economics and Management, [S. l.], v. 15, n. 1, p. 147–174, 2026. Disponível em: https://journals.unizik.edu.ng/njcem/article/view/8282. Acesso em: 24 jun. 2026.