Doan VK. Using Shadowing Technique to Improve English-Majored Sophomores’ English Speaking Skills at Hanoi University of Natural Resources and Environment. J. Knowl. Learn. Sci. Technol. [Internet]. 2025 Aug. 29 [cited 2025 Sep. 11];4(3):55–71. Available from: https://jklst.org/index.php/home/article/view/327