Bal Obaid, A. K., & Ahmed, R. (2010). Effectiveness of the accelerated learning approach in improving students writing skills. Al-Imam Muhammad Ibn Saud Islamic University, College of Languages and Translation, Department of English Language and Literature.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bal Obaid, Abeer Khamees, و Rafik Ahmed. Effectiveness of the Accelerated Learning Approach in Improving Students Writing Skills. Riyadh: Al-Imam Muhammad Ibn Saud Islamic University, College of Languages and Translation, Department of English Language and Literature, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Bal Obaid, Abeer Khamees, و Rafik Ahmed. Effectiveness of the Accelerated Learning Approach in Improving Students Writing Skills. Al-Imam Muhammad Ibn Saud Islamic University, College of Languages and Translation, Department of English Language and Literature, 2010.