เอมโอด เ. “Plengrong Ramtone Sukhothai (Sukhothai Ramtone Vocal Music) Case Study of Songs Collection by Mrs.Thongjua Suabchompoo”. Liberal Arts Review, vol. 13, no. 25, Aug. 2018, pp. 67-78, https://so04.tci-thaijo.org/index.php/larhcu/article/view/143021.