Muhamad Khairul bin Zakaria. (2016). Metadiscourse in the academic writing of Malaysian and Arab pre-university students at the International Islamic University Malaysia. Kulliyyah of Islamic Revealed Knowledge and Social Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Muhamad Khairul bin Zakaria. Metadiscourse in the Academic Writing of Malaysian and Arab Pre-university Students at the International Islamic University Malaysia. Gombak, Selangor: Kulliyyah of Islamic Revealed Knowledge and Social Sciences, International Islamic University Malaysia, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Muhamad Khairul bin Zakaria. Metadiscourse in the Academic Writing of Malaysian and Arab Pre-university Students at the International Islamic University Malaysia. Kulliyyah of Islamic Revealed Knowledge and Social Sciences, International Islamic University Malaysia, 2016.