Al Ghobiri، M.، و Williamson، J. G. (1998). Development plans in metropolitan areas : the experience of greater manchester: An assessment of the development plan with particular reference to the current practice of greater manchester (رسالة ماجستير غير منشورة). University of Manchester، مانشستر. مسترجع من http://search.mandumah.com/Record/599035
Al Ghobiri، Mohammad، و Jeffery G. Williamson. "Development Plans in Metropolitan Areas : The Experience of Greater Manchester: An Assessment of the Development Plan With Particular Reference to the Current Practice of Greater Manchester" رسالة ماجستير. University of Manchester، مانشستر، 1998. مسترجع من http://search.mandumah.com/Record/599035