Al-Ansi, N. A. (2006). Housing problem in developing countries: A comprehensive study of spontaneous housing in Sana'a, Yemen. Fakulti Kejuruteraan, Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Ansi, Nashwan Abdoulkarim. Housing Problem in Developing Countries: A Comprehensive Study of Spontaneous Housing in Sana'a, Yemen. Bangi: Fakulti Kejuruteraan, Universiti Kebangsaan Malaysia, 2006.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Ansi, Nashwan Abdoulkarim. Housing Problem in Developing Countries: A Comprehensive Study of Spontaneous Housing in Sana'a, Yemen. Fakulti Kejuruteraan, Universiti Kebangsaan Malaysia, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.