Zahlok, M. ., and Manal Mahmod. “The Effectiveness of the Therapeutic Language Program in the Development of Expressive Language Skill of Children With Down Syndrome”. Latakia University Journal - Arts and Humanities Sciences Series, vol. 38, no. 3, Feb. 2017, https://journal.latakia-univ.edu.sy/index.php/humlitr/article/view/2456.