Suhail TF. Effectiveness of in-service training program to develop the professional performance of teachers in the special education complex / Al-Quds Open University. Edu [Internet]. 2020 Sep. 1 [cited 2025 Dec. 23];47(3):16-31. Available from: https://dsr.ju.edu.jo/djournals/index.php/Edu/article/view/2369