จันทร์เทพส., จันทร์เรืองย., & เท็งตระกูลอ. (2019). The Use of Exercise Package to Develop the Reading Skill on Obscured Thai pelling Rules by Using the Stad Learning Technique for Prathomsuksa 2 Students at hesaban 1 Wat Prom Wihan School in Mae Sai District, Chiang Rai Province. Journal of Graduate Research, 10(1), 23-40. Retrieved from https://so02.tci-thaijo.org/index.php/banditvijai/article/view/174156