Ashma Shamail, and Shanti Rekha Rao. “COVID-19 and Lockdown: Anxiety Levels and Sleep Difficulties Among School Students in Saudi Arabia”. Pegem Journal of Education and Instruction, vol. 13, no. 2, Nov. 2023, pp. 386-94, https://pegegog.net/index.php/pegegog/article/view/2877.