Adnan bin Yusoff. (1998). Defective contracts in Islamic commercial law: With special reference to al-ghabn, al-istighlal and al-gharar. International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Adnan bin Yusoff. Defective Contracts in Islamic Commercial Law: With Special Reference to Al-ghabn, Al-istighlal and Al-gharar. Petaling Jaya: International Islamic University Malaysia, 1998.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Adnan bin Yusoff. Defective Contracts in Islamic Commercial Law: With Special Reference to Al-ghabn, Al-istighlal and Al-gharar. International Islamic University Malaysia, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.