Ummi Aqilah Khalid. (2016). The assessment of heavy rail-based public transportation performances under national key results area (NKRA) 2011-2012: The case of KTM Komuter. Kuliyyah of Architecture and Environmental Design, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ummi Aqilah Khalid. The Assessment of Heavy Rail-based Public Transportation Performances Under National Key Results Area (NKRA) 2011-2012: The Case of KTM Komuter. Gombak, Selangor: Kuliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ummi Aqilah Khalid. The Assessment of Heavy Rail-based Public Transportation Performances Under National Key Results Area (NKRA) 2011-2012: The Case of KTM Komuter. Kuliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 2016.