Tungkup, Doharman Lumban. “The Importance of Online Transportation Effectiveness for Business Resistance Strategies During the Covid-19 Pandemic”. KnE Social Sciences 5, no. 1 (January 12, 2021): 396–414. Accessed April 20, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/8302.