Daif Allah، A. S. (2010). Foreign Language Demotivation: Evidence form Saudi Students of the preparatory Year program. مستقبل التربية العربية، مج17, ع64 ، 2 - 59. مسترجع من http://search.mandumah.com/Record/668966
Daif Allah، Ayman Sabry. "Foreign Language Demotivation: Evidence Form Saudi Students of the Preparatory Year Program." مستقبل التربية العربية مج17, ع64 (2010): 2 - 59. مسترجع من http://search.mandumah.com/Record/668966