Siti Hafizah binti Daud. (2012). Motivation and job satisfaction among customs officers: A case study of Kuala Lumpur International Airport (KLIA). Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Siti Hafizah binti Daud. Motivation and Job Satisfaction Among Customs Officers: A Case Study of Kuala Lumpur International Airport (KLIA). Kuala Lumpur: Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2012.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Siti Hafizah binti Daud. Motivation and Job Satisfaction Among Customs Officers: A Case Study of Kuala Lumpur International Airport (KLIA). Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2012.