Alfiandri A, Prasojo E, Salomo RV. COLLABORATION OF MARINE ECOTOURISM IN RIAU ISLANDS PROVINCE TOWARDS SUSTAINABLE TOURISM. ASSRJ [Internet]. 2021 Mar. 14 [cited 2026 Apr. 17];8(3):45-60. Available from: https://journals.scholarpublishing.org/index.php/ASSRJ/article/view/9798