1. World Health Organization: Rolling updates on Coronavirus disease (COVID-19), 2020 Available from: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/events-as-they-happen.
2. United Nations Educational, Scientific and Cultural Organization: COVID-19 impact on education, 2020 Available from: https://en.unesco.org/covid19/educationresponse.
3. World Health Organization: WHO Coronavirus disease (COVID-19) dashboard, 2021 Available from: https://www.who.int.
4. Ministry of Health Project Management Support Unit: COVID-19 Emergency Health Project, 2020 Available from: https://pydb.saglik.gov.tr/EN,68690/covid-19-emergency-health-project.html.
5. Higher Education Information Management System: Number of Students by Education Level (2019-2020), 2020 Available from: https://istatistik.yok.gov.tr/ (in Turkish).