Sinulingga, Samerdanta, Riko Andika Rahmat Pohan, and Erna Januarini. “Optimizing Sustainable Tourism in North Sumatra: An Analytic Hierarchy Process Approach Using Alternative Sustainability Metrics”. Journal of Research in Mathematics Trends and Technology 6, no. 1 (March 30, 2024): 35-45. Accessed November 22, 2024. https://talenta.usu.ac.id/jormtt/article/view/17740.