Adiprayoga, S. N., H. Yaqin, T. Anugerah, and T. Nisari. “reen ourism oncept mplementation ased on ourist atisfaction evel n apanuli engah egency”. nternational ournal of arine ngineering nnovation and esearch, vol. 9, no. 4, July 2025, pp. 637-45, doi:10.12962/j25481479.v9i4.4823.