Al Dayil، A. A. R.، و Saunders، D. M. (1991). Male Elementary School principals' Perceptions of Junior College Student Teacher Performance in Riyadh, Saudi Arabia (رسالة دكتوراه غير منشورة). George Washington University، واشنطن. مسترجع من http://search.mandumah.com/Record/611739
Al Dayil، Abd Alaziz Rashed، و Deloris Muldrow Saunders. "Male Elementary School Principals' Perceptions of Junior College Student Teacher Performance in Riyadh, Saudi Arabia" رسالة دكتوراه. George Washington University، واشنطن، 1991. مسترجع من http://search.mandumah.com/Record/611739