Kawon, Kannika, Sunita Sarawong, and Anucha Wilaikaew. “Value of Willingness to Accept the Difference in Purchase Price of Green Sugarcane and Burned Sugarcane of Farmers in Pak Puan Sub-District, Wang Saphung District, Loei Province”. Research and Development Journal, Loei Rajabhat University 17, no. 61 (October 21, 2022): 17–25. accessed April 26, 2025. https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/258256.