Obstacles to the implementation of the comprehensive quality control assurance in Sana’a University. And the crucial ways to overcomeit. Journal of Social Sciences, [S. l.], v. 3, n. 08, p. 361–387, 2019. Disponível em: https://journalsocialsciences.de/index.php/jss/article/view/583. Acesso em: 6 aug. 2026.