Kunpalin, Poowanida, Wilaiwatt Grisanaputi, Nutida Yolai, and Pichai Rawengwan. 2019. “Means to Promote Lifelong Learning of Farmers to Wards Community Economics of Growing Poisonless Vegetables”. Journal of Graduate MCU KhonKaen Campus 6 (1):344-56. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/243676.