Abdullah Muhammad Zin. (1990). Abd al-Qadir al-Jilani: His contributions to the methodological studies of Islamic da'wah (mission). University of Kent at Canterbury.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Abdullah Muhammad Zin. Abd Al-Qadir Al-Jilani: His Contributions to the Methodological Studies of Islamic Da'wah (mission). Canterbury: University of Kent at Canterbury, 1990.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Abdullah Muhammad Zin. Abd Al-Qadir Al-Jilani: His Contributions to the Methodological Studies of Islamic Da'wah (mission). University of Kent at Canterbury, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.