Sookplung, D., C. Thawornratana, and A. Jai-aree. “Factors Affecting Organic Farming of Farmers in Suphan Buri Province”. Journal of Multidisciplinary in Humanities and Social Sciences, vol. 5, no. 3, Aug. 2022, pp. 1166-84, https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/259101.