Lumbantobing, Tomson Saut Parulian, and Priyantoro Widodo. 2021. “Online Bible Study During a Pandemic: Challenges, Solutions, and Opportunities”. GRAFTA: Journal of Christian Religion Education and Biblical Studies 1 (1):34-49. https://www.grafta.stbi.ac.id/index.php/GRAFTA/article/view/1.