Jannadi، M. O. A.، و Murphree، E. L. (1989). The Effect of Construction Foremen's Practices on Safety in Building Projects in Saudi Arabia (رسالة دكتوراه غير منشورة). George Washington University، واشنطن. مسترجع من http://search.mandumah.com/Record/611460
Jannadi، M. Osama Ahmed، و Edward Lile Murphree. "The Effect of Construction Foremen's Practices On Safety in Building Projects in Saudi Arabia" رسالة دكتوراه. George Washington University، واشنطن، 1989. مسترجع من http://search.mandumah.com/Record/611460