สุขชัย ศิรารัตน์, and ทะโกษา วรเขต. “Teaching Methods of Legendary Classical Vocal Pedagogues”. Rangsit Music Journal 13, no. 1 (May 31, 2018): 105–118. accessed August 28, 2026. https://so06.tci-thaijo.org/index.php/rmj/article/view/126393.