ECOTOURISM DEVELOPMENT STRATEGY OF AEK MARTUAWATERFALL IN ROKAN HULU DISTRICT, RIAU PROVINCE. Universitas Riau [Internet]. 2025 Jun. 26 [cited 2025 Aug. 2];4(1):20-7. Available from: https://jiik.ejournal.unri.ac.id/index.php/JIIK/article/view/105