Phuong Linh P, Angsuwiriya N. Challenges of Pronouncing and Applying Thai Tone Rules Faced by Vietnamese Learners. ARTS [internet]. 2025 Dec. 30 [cited 2026 Aug. 31];47(3):E4810 (1-21). available from: https://so08.tci-thaijo.org/index.php/artssu/article/view/4810