Pichaporn Somwang และ Sayam Chuangprakhon. (2020) The Development of Constructivist Learning Activities Set to Western Music Learning for Grade 7. <i>Journal of Humanities and Social Sciences</i>, <i>39</i>(2), .89-97.Pichaporn Somwang และ Sayam Chuangprakhon. "The Development of Constructivist Learning Activities Set to Western Music Learning for Grade 7". Journal of Humanities and Social Sciences 39 (2020):.89-97.Pichaporn Somwang และ Sayam Chuangprakhon. The Development of Constructivist Learning Activities Set to Western Music Learning for Grade 7. mahasarakham university:ม.ป.ท. 2020.