ไกรมงคลประชา ก., and T. Boonyam. “Teaching Activities With Thai Instrument for Down Syndrome Childen: A Case Study of Baan Keng Khim Thai Music School”. Mahidol Music Journal, vol. 2, no. 2, May 2020, pp. 4-18, https://so04.tci-thaijo.org/index.php/mmj/article/view/241791.