Telaumbanua, Folala, Hizkia Ronaldus Silalahi, Jonathan Simanjuntak, Syaluddin Rezha Siregar, Maria Isadora Simangunsong, Simon Panjaitan, and Agusmanto JB Hutauruk. 2021. “Psychological Encouragement for High School Students in Preparation for Online Learning During Covid-19”. Middle European Scientific Bulletin 14 (July). https://doi.org/10.47494/mesb.2021.14.672.