มงคลเจริญสกุล สุรพจน์. 2019. “The Phenomenon of Corn Invasion into Forest Areas and the Proposal for Land Management in the Northern Highland Forest”. Journal of Social Sciences, Chiang Mai University 27 (2). Chiangmai, Thailand:101-19. https://so04.tci-thaijo.org/index.php/jss/article/view/171648.