Ali، H. M. A. E. (2019). Investigating Problems Encountered by Sudanese EFL learners in Using Affixes at Tertiary Level from Teachers Perspectives. مجلة الدراسات اللغوية والأدبية، مج20, ع4 ، 100 - 118. مسترجع من http://search.mandumah.com/Record/1072964
Ali، Hassan Mohammed Abd Elhadi. "Investigating Problems Encountered By Sudanese EFL Learners in Using Affixes At Tertiary Level From Teachers Perspectives." مجلة الدراسات اللغوية والأدبية مج20, ع4 (2019): 100 - 118. مسترجع من http://search.mandumah.com/Record/1072964