Ahmed، M. E. M. (2018). Investigating the Impact of Prepositional Errors on the Sudanese University Translation Students' Performance (English – Arabic). مجلة الدراسات اللغوية والأدبية، مج19, ع2 ، 145 - 152. مسترجع من http://search.mandumah.com/Record/1004835
Ahmed، Mohamed El-Bashir Mohamed. "Investigating the Impact of Prepositional Errors On the Sudanese University Translation Students' Performance (English – Arabic)." مجلة الدراسات اللغوية والأدبية مج19, ع2 (2018): 145 - 152. مسترجع من http://search.mandumah.com/Record/1004835