1. Y. N. Lee. "The pandemic could leave Indonesia's 69 million students further behind their global peers." https://www.cnbc.com/2020/08/26/coronavirus-pandemic-could-leave-indonesian-students-further-behind-peers.html (accessed February 1st, 2021, 2021).
2. G. N. Adi and A. Rochman, "Regions close schools, cancel public events because of COVID-19," in The Jakarta Post, ed. Jakarta, 2020. [Online]. Available: https://www.thejakartapost.com/news/2021/01/13/japan-set-to-expand-state-of-emergency-public-cools-to-olympics.html
3. C. Osborne. "Zoom security: Your meetings will be safe and secure if you do these 10 things." ZDNet. https://www.zdnet.com/article/make-sure-your-zoom-meetings-are-safe-by-doing-these-10-things/ (accessed November 27th, 2020).
4. R. Fachriansyah. "Data breach jeopardizes more than 15 million Tokopedia users, report finds." https://www.thejakartapost.com/news/2020/05/03/data-breach-jeopardizes-more-than-15-million-tokopedia-users-report-finds.html (accessed November 27th, 2020).
5. Mailizar, A. Almanthari, S. Maulina, and S. Bruce, "Secondary School Mathematics Teachers' Views on E-learning Implementation Barriers during the COVID-19 Pandemic: The Case of Indonesia," EURASIA Journal of Mathematics, Science and Technology Education, vol. 16, no. 7, 2020, doi: 10.29333/ejmste/8240.