Abdul al Kadir, Y. M. (2004). Employees' perception about the characteristics of visionary learders: A study at the Department of Human Resources Management in Petroliam Nasional Berhad (Petronas) Gas Berhad. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Abdul al Kadir, Yassin Madani. Employees' Perception About the Characteristics of Visionary Learders: A Study at the Department of Human Resources Management in Petroliam Nasional Berhad (Petronas) Gas Berhad. Gombak, Selangor: Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2004.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Abdul al Kadir, Yassin Madani. Employees' Perception About the Characteristics of Visionary Learders: A Study at the Department of Human Resources Management in Petroliam Nasional Berhad (Petronas) Gas Berhad. Kulliyyah of Islamic Revealed Knowledge and Human Sciences, International Islamic University Malaysia, 2004.