Jindawat, N., and D. Udtaisuk. “An Analysis of Improvisation Contents and Teaching Approach in Piano Method Books for Beginner Students”. Journal of Education Studies, vol. 52, no. 1, Mar. 2024, p. EDUCU5201005 (17 pages), https://so02.tci-thaijo.org/index.php/EDUCU/article/view/259799.