Ibrahim, A. H. (2001). Land management, environmental change and society coping mechanisms at Ennuhud Area, Western Sudan. Fakulti Sains Kemasyarakatan Dan Kemanusiaan, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ibrahim, Ahmed Hamed. Land Management, Environmental Change and Society Coping Mechanisms at Ennuhud Area, Western Sudan. Bangi: Fakulti Sains Kemasyarakatan Dan Kemanusiaan, Universiti Kebangsaan Malaysia, 2001.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ibrahim, Ahmed Hamed. Land Management, Environmental Change and Society Coping Mechanisms at Ennuhud Area, Western Sudan. Fakulti Sains Kemasyarakatan Dan Kemanusiaan, Universiti Kebangsaan Malaysia, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.