Malybari، E. A. A. A.، و Bower، D. (2011). Managing Value, Requirements and Risk in the Appraisal Stage of UK Construction Projects (رسالة دكتوراه غير منشورة). University of Leeds، ليدز. مسترجع من http://search.mandumah.com/Record/601065
Malybari، Ehab Abd Araheem A.، و Denise Bower. "Managing Value, Requirements and Risk in the Appraisal Stage of UK Construction Projects" رسالة دكتوراه. University of Leeds، ليدز، 2011. مسترجع من http://search.mandumah.com/Record/601065