Tapa, Junjira, Phimphaka Thammasit, and Chatphum Sichomphoo. “The Guidelines for Change Management on Learning Process Development of Small-Sized Schools Under Phitsanulok Primary Education Service Area 3”. Journal of Graduate Research 11, no. 2 (December 1, 2020): 149-162. Accessed May 14, 2021. https://so02.tci-thaijo.org/index.php/banditvijai/article/view/240960.