Tendean, Jolf John, Bartholomeus Diaz Nainggolan, and Stimson Hutagalung. “Pandemic Covid-19, Health Literature and Great Commission”. GRAFTA: Journal of Christian Religion Education and Biblical Studies 1, no. 1 (July 26, 2021): 1–11. Accessed July 19, 2025. https://www.grafta.stbi.ac.id/index.php/GRAFTA/article/view/10.