Anuttaranggoon, R. and Sattayawatee, N. 2022. Effects of the centralization through the online teaching policy of the Ministry of Education during the Covid-19 epidemic: A case study of a small school in one sub-district in Nakhon Sawan Province. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal. 9, 2 (Dec. 2022), 55–67.