บุญญวิศิษฏ์ พ. ว. “MIDDLE PATH AND SUFFICIENCY ECONOMY OF THE KING RAMA IX”. MCU Haripunchai Review, vol. 3, no. 1, July 2019, pp. 67-77, https://so04.tci-thaijo.org/index.php/JMHR/article/view/190914.