Thummarattana, P. and Trakarnrung, S. (2015) “Effective Contemporary Commercial Music Vocal Training for Thai Singers”, Fine Arts Journal: Srinakharinwirot University, 19(1), pp. 39–49. available at: https://so01.tci-thaijo.org/index.php/jfofa/article/view/92942 (accessed: 11 September 2026).