Dewi VE. The Effect of Application Middle Level Violin Textbooks on Violin Playing Skills in the Music Study Program, Faculty of Languages and Arts, Universitas Negeri Surabaya. Gondang [Internet]. 2023 Jun. 9 [cited 2025 Feb. 23];7(1):58-69. Available from: http://103.242.233.34/index.php/GDG/article/view/43805