Umar, A. M. (2016). Challenges faced by Nigerian postgraduate students in Malaysia and their impact on their academic performance: A case study of International Islamic University Malaysia. Kulliyyah of Islamic Revealed Knowledge and Human Science, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Umar, Abdullahi Mohammed. Challenges Faced by Nigerian Postgraduate Students in Malaysia and Their Impact on Their Academic Performance: A Case Study of International Islamic University Malaysia. Gombak, Selangor: Kulliyyah of Islamic Revealed Knowledge and Human Science, International Islamic University Malaysia, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Umar, Abdullahi Mohammed. Challenges Faced by Nigerian Postgraduate Students in Malaysia and Their Impact on Their Academic Performance: A Case Study of International Islamic University Malaysia. Kulliyyah of Islamic Revealed Knowledge and Human Science, International Islamic University Malaysia, 2016.