Al Shammari، A. E.، و Bernard، Y. (2010). The Use and Need of Electronic Transport Information and Safety Systems: The Difference between the UK and Saudi Arabia (رسالة ماجستير غير منشورة). University of Leeds، ليدز. مسترجع من http://search.mandumah.com/Record/601158
Al Shammari، Ayed E.، و Yvonne Bernard. "The Use and Need of Electronic Transport Information and Safety Systems: The Difference between the UK and Saudi Arabia" رسالة ماجستير. University of Leeds، ليدز، 2010. مسترجع من http://search.mandumah.com/Record/601158