Khairul Azmi, Cut Nuraini, and Abdi Sugiarto. “Analysis of Tourism Area Development in Bukit Lawang, North Sumatra”. International Journal of Mechanical, Electrical and Civil Engineering 2, no. 1 (January 9, 2025): 67–80. Accessed February 7, 2025. https://international.aritekin.or.id/index.php/IJMECIE/article/view/134.