Muhammad Haikal bin Ahmad Pua'ad. (2017). Group-directed organisational citizenship behaviour, interactional justice, and group identification among lecturers in three higher learning institutions. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Muhammad Haikal bin Ahmad Pua'ad. Group-directed Organisational Citizenship Behaviour, Interactional Justice, and Group Identification Among Lecturers in Three Higher Learning Institutions. Kuala Lumpur: Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Muhammad Haikal bin Ahmad Pua'ad. Group-directed Organisational Citizenship Behaviour, Interactional Justice, and Group Identification Among Lecturers in Three Higher Learning Institutions. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2017.