Antonius Gultom, Ledy Misnatalia Pasaribu, and Anita Chintia Inggri Gultom. “ANALYSIS OF CIRCULAR NUMBER 4 OF 2020 ON IMPLEMENTATION OF EDUCATION POLICY IN EMERGENCY DURING COVID-19 SPREAD”. Innovative Technologica: Methodical Research Journal, vol. 2, no. 01, Jan. 2021, pp. 17-26, https://it.academiascience.org/index.php/it/article/view/4.