Human Sigma as an Approach to Improve Quality of the University Educational Process: An Applied Study on the Egyptian Administrative University Education. The Arab Journal of Administration, Cairo, v. 45, n. 2, p. 203–238, 2025. DOI: 10.21608/aja.2024.301756.1672. Disponível em: https://ajajournal.org/index.php/aja/article/view/737. Acesso em: 22 apr. 2026.