Mohd Hilmi Bin Hamzah. (2007). Language anxiety among first-year Malay students of the International Islamic College: An investigation of L2 skills, sources of anxiety, and L2 performance. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mohd Hilmi Bin Hamzah. Language Anxiety Among First-year Malay Students of the International Islamic College: An Investigation of L2 Skills, Sources of Anxiety, and L2 Performance. Gombak, Selangor: Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2007.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Mohd Hilmi Bin Hamzah. Language Anxiety Among First-year Malay Students of the International Islamic College: An Investigation of L2 Skills, Sources of Anxiety, and L2 Performance. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2007.