Haitao, Yan, and Sakchai Hirunrux. “Problems and Solutions of Vocal Music Teaching in Hezhou University in China”. Journal of Modern Learning Development 8, no. 6 (June 30, 2023): 194–200. accessed October 5, 2026. https://so06.tci-thaijo.org/index.php/jomld/article/view/260700.