Intaraprajob, Inthuraporn, Somsak Chanphong, Thammarat Photisuwanpanya, and Chukiat Phalapol. 2021. “The Development of Safe Agriculture of Ban Na Fai Organic Vegetable Growing Group Muang District, Chaiyaphum Province”. Journal of Modern Learning Development 7 (1):357-71. https://so06.tci-thaijo.org/index.php/jomld/article/view/250082.