Haqqul Mulki, Muhammad, and Beny Octofryana Yousca Marpaung. “Performance Indicators for Energi Management of Tourism in The Pangururan District Kabupaten Samosir ”. International Journal of Architecture and Urbanism 6, no. 1 (March 31, 2022): 15-20. Accessed May 8, 2024. https://talenta.usu.ac.id/ijau/article/view/8668.