Surasni, Surasni, and Ahmad Sumali. “Optimizing Online Learning With the Google Classroom Application Approach During the Covid-19 Pandemic at SMP Negeri 16 Jakarta”. International Journal of Economics Education Research (IJEER), vol. 3, no. 2, Nov. 2022, https://openjournal.unpam.ac.id/index.php/IJEER/article/view/25810.