Sridan, Pornpod, and Thidasil Plainlaor. “Social Return on Investment (SROI) of Tourism Management on Koh Sichang: Insights from the Blue Economy Framework”. Journal of Applied Economics and Management Strategy 13, no. 1 (April 30, 2026): 1–19. Accessed September 9, 2026. http://kuojs.lib.ku.ac.th/index.php/jaems/article/view/6480.