محمد هلا. 2021. “Psychometric Properties of (DASS-21) Depression-Anxiety-Stress Scales »A Field Study on a Sample of the Syrian Community During the COVID-19 Outbreak«”. Tishreen University Journal- Arts and Humanities Sciences Series 43 (3). https://journal.tishreen.edu.sy/index.php/humlitr/article/view/10687.