Wannapaka J, Wannaudon S. Main Conceptual of External Reading Books for Thai Language Subject at Secondary School Levels 1-3. AJMBU [Internet]. 2021 Nov. 15 [cited 2024 May 3];10(2):851-64. Available from: https://so01.tci-thaijo.org/index.php/AJMBU/article/view/249832