Naldi, Jefri, and Siti Fatimah. “Historical Insight and Characteristic Culture Value of Historical Tour Guide in Japanese Tunnel Tourism Object”. Science and Environmental Journal for Postgraduate 1, no. 2 (June 1, 2019): 61-68. Accessed April 26, 2024. http://senjop.ppj.unp.ac.id/index.php/senjop/article/view/23.