Sánchez-Teruel, David, and María Auxiliadora Robles-Bello. “Preliminary Study on Psychometric Properties of an Anxiety Scale in Down Syndrome With Anxiety Symptoms”. International Journal of Psychological Research 13, no. 1 (January 20, 2020): 50–61. Accessed November 21, 2024. https://revistas.usb.edu.co/index.php/IJPR/article/view/4493.