Doan, Van Kieu. “Using Shadowing Technique to Improve English-Majored Sophomores’ English Speaking Skills at Hanoi University of Natural Resources and Environment”. Journal of Knowledge Learning and Science Technology ISSN: 2959-6386 (online) 4, no. 3 (August 29, 2025): 55–71. Accessed September 11, 2025. https://jklst.org/index.php/home/article/view/327.