เหล่าเขตร์การ ป. Strategy for Personnel Development with the Action Research at Schools of the Consolidated Secondary School District 42, Ministry of Education. JAR [internet]. 2020 Apr. 14 [cited 2026 Sep. 11];18(3):30-44. available from: https://so04.tci-thaijo.org/index.php/jar/article/view/241169