Tapakdee A, Pree-iam P, Rittidet P. The Development of Self-Directed Activities on the Environment in the Community Prathomsuksa 3 Students. IARJ [internet]. 2022 Aug. 5 [cited 2026 Sep. 11];2(4):301-14. available from: https://so03.tci-thaijo.org/index.php/IARJ/article/view/262584