Ham, Pham Ngoc. “NUMBER 9: AN EXAMPLE OF WORDS THAT DESCRIBE NUMBERS IN CHINESE AND VIETNAMESE”. VNU Journal of Foreign Studies 38, no. 4 (August 31, 2022): 31–41. Accessed March 31, 2025. https://jfs.ulis.vnu.edu.vn/index.php/fs/article/view/4816.