Viratchayanukul K, Wongsuwan Kongpao W. Instruction Using Please Strategy to Improve Academic Essay Writing Abilities of Upper Secondary Students. OJED [internet]. 2025 Dec. 11 [cited 2026 Oct. 8];20(2):1-15. available from: https://so01.tci-thaijo.org/index.php/OJED/article/view/280992