Suriyos , A. (2023) “The Efficiency of Trumpet Exercises Book for Trumpet Performance in the University Level of Rajabhat University”, Lawarath Social E-Journal, 5(1), pp. 53–66. available at: https://so04.tci-thaijo.org/index.php/lawarathjo/article/view/260094 (accessed: 14 September 2026).