Survey Tingkat Kebugaran Jasmani Skipper Arung Jeram Exsplore Sumatera Kabupaten Langkat. JIK [Internet]. 2018 Jun. 8 [cited 2026 Mar. 21];17(1):37-49. Available from: https://jurnal.unimed.ac.id/2012/index.php/JIK/article/view/9962