Xinyi , X. ., & Roongruang, P. . (2024). Constructing the Teaching Guidebook for Children’s Chorus in Advanced Class at the Mastery Iris Blue Choir. Journal of Roi Kaensarn Academi, 9(12), 3513–3519. สืบค้น จาก https://so02.tci-thaijo.org/index.php/JRKSA/article/view/279060