Rahmadi, Rahmadi. “Increased Activity and Learning Outcomes Using the WhatsApp and Google Form Applications in the Covid-19 Pandemic Period”. Science Education and Application Journal 3, no. 1 (March 25, 2021): 24–35. Accessed May 2, 2024. http://jurnalpendidikan.unisla.ac.id/index.php/SEAJ/article/view/364.