Ibrahim, Altaf Ramadhan. “Using Statistics for Measuring Quality Of Science Students Learning Assessment for Courses in Faculty of Education – Aden University the Year of (2009-2010)”. The Arab Journal For Quality Assurance in Higher Education 6 (March 1, 2013). Accessed November 29, 2024. https://journals.ust.edu/index.php/AJQAHE/article/view/571.