มณีรัตน์ ณ. and ทัดแก้ว ช. (2019) “The Importance of Numeral Systems in Trinisinghe”, Journal of Letters, 48(1), pp. 144–161. Available at: https://so03.tci-thaijo.org/index.php/jletters/article/view/199607 (Accessed: 29 March 2024).