บุญยะศิรินันท์ ล. Variables Reduction for Creativity Tourism Approaches in Sustainable Ecotourism Business Development: A Case Study of Tourists in Thailand National Parks. CRMA_HUSO [internet]. 2018 Aug. 1 [cited 2026 Oct. 7];5:243-58. available from: https://so01.tci-thaijo.org/index.php/CRMA_HUSO/article/view/154548