Duangchatom APDK, Pumdeeying DN. 21st Century Thinking Skills of Educational Institutions in the Basic Education Institutions Office, Maha Sara kham Province. JDSC [internet]. 2019 Jun. 30 [cited 2026 Oct. 3];6(1):23-38. available from: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/211358