Naranuphap, S., & Attavanich, W. . (2020). Assessment of Willingness to Pay to Prevent Air Pollution from Particulate Matters 2.5 (PM2.5) in Bangkok. Journal of Buddhist Education and Research, 6(2), 295–30. Retrieved from https://so06.tci-thaijo.org/index.php/jber/article/view/243483