Alabd Allah، N. A.، و Roberts، J. A. (2002). Assessment of the Surveillance System at Three Hospitals of the Ministry of Health in Saudi Arabia (رسالة ماجستير غير منشورة). University of London، لندن. مسترجع من http://search.mandumah.com/Record/608212
Alabd Allah، Nabeela Abdulllah، و Jennifer A. Roberts. "Assessment of the Surveillance System At Three Hospitals of the Ministry of Health in Saudi Arabia" رسالة ماجستير. University of London، لندن، 2002. مسترجع من http://search.mandumah.com/Record/608212