Assem Alqarni. "An Analytical Study of Difficulties in Learning the Passive Voice/Structure". Journal of Arts, Literature, Humanities and Social Sciences, no. 98 (ديسمبر 20, 2023): 470-482. تاريخ الوصول أبريل 30, 2025. https://www.jalhss.com/index.php/jalhss/article/view/1134.