Wongwanich, Suwimon, Nonglak Wiratchai, Haruthai Ajpru, and Niorn Chaiyapornpattana. 2009. “Development of the Standard for Learning Resource Provision”. Kasetsart Journal of Social Sciences 30 (3):239-47. https://so04.tci-thaijo.org/index.php/kjss/article/view/246518.