Ratrongtai, Veerachai, and Wichian Rooyuenyong. 2019. “Strategy for School Administration to Raise Learning Achievement Level of Schools Under Nakhon Ratchasima Primary Education Areas”. Journal of Graduate MCU KhonKaen Campus 6 (2):342-59. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/243594.