เอมโอด เกษร. 2018. “Plengrong Ramtone Sukhothai (Sukhothai Ramtone Vocal Music) Case Study of Songs Collection by Mrs.Thongjua Suabchompoo”. Liberal Arts Review 13 (25):67-78. https://so04.tci-thaijo.org/index.php/larhcu/article/view/143021.