Van, Tu Anh. “Initial Experiment on Using CoolEdit and PRAAT in Teaching Vietnamese Tones to Foreigners and Hard-of-Hearing Children”. JOURNAL OF INQUIRY INTO LANGUAGES AND CULTURES 2, no. 1 (April 30, 2018): 1–8. Accessed November 8, 2026. https://jilc.vn/index.php/jilc/article/view/234.