Sarakarn A, Ployphakwaen P, Wannaphongcharoen B. The Application of 4M in the Prevention of Coronavirus Disease - 2019 of Local Administrative Organizations in Nakhon Ratchasima Province. KPI journal [internet]. 2023 Jan. 26 [cited 2025 Dec. 11];20(3):34-62. available from: https://so06.tci-thaijo.org/index.php/kpi_journal/article/view/256513