ABDEL AAL, Antar Ahmed Mohammed. The internal proficiency of the preparatory year students at the University of Hail in Saudi. The Arab Journal For Quality Assurance in Higher Education, [S. l.], v. 3, 2010. DOI: 10.20428/ajqahe.v3i0.611. Disponível em: https://journals.ust.edu/index.php/AJQAHE/article/view/611. Acesso em: 20 dec. 2024.