Sangnate, V., Intorrathed, S., Khemtong, P., and Poungsuk, P. “The current condition of teaching and learning on agriculture teachers training of Thailand”. International Journal of Agricultural Technology, vol. 12, no. 5, Sept. 2016, pp. 841-50, https://li04.tci-thaijo.org/index.php/IJAT/article/view/6667.