คามวัลย์ ป., กมลศิลป์ ด., and กมลศิลป์ ด. “Management of Vocation Education by Informal and Non-Formal Education Centre in Mung District of Roi Et Province”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 7, no. 2, Feb. 2018, pp. 147-56, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/196663.