Laosuk, K., R. Srisombut, and M. Wisuttipat. “Southern Thai Folk Vocal Music in Chumphon Province”. Journal of the Faculty of Arts, Silpakorn University, vol. 42, no. 1, June 2020, pp. 258-7, https://so04.tci-thaijo.org/index.php/jasu/article/view/243294.