Premsuk, Chayanisa, Pichai thongdeerert, and Patcharavadee Sriboonruang. “Adoption of the Participatory Guarantee System (PGS) Phra Nakhon Si Ayutthaya Of Organic Farmers”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 9, no. 2 (August 2, 2022): 109–122. Accessed May 19, 2024. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/254512.