Zulkifli bin Ishak. (2009). The Malay world of the medieval European imagination: The case of Ludovico Di Varthema's travel accounts on the Malay world. Kulliyyah of Islamic Revealed Knowledge, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Zulkifli bin Ishak. The Malay World of the Medieval European Imagination: The Case of Ludovico Di Varthema's Travel Accounts on the Malay World. Gombak, Selangor: Kulliyyah of Islamic Revealed Knowledge, International Islamic University Malaysia, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Zulkifli bin Ishak. The Malay World of the Medieval European Imagination: The Case of Ludovico Di Varthema's Travel Accounts on the Malay World. Kulliyyah of Islamic Revealed Knowledge, International Islamic University Malaysia, 2009.