Le Van, T., and H. Hai Tien. “INTEGRATING PROJECT-BASED LEARNING INTO ENGLISH FOR SPECIFIC PURPOSES CLASSES AT TERTIARY LEVEL: PERCEIVED CHALLENGES AND BENEFITS”. VNU Journal of Foreign Studies, vol. 37, no. 4, Aug. 2021, pp. 128-4, https://jfs.ulis.vnu.edu.vn/index.php/fs/article/view/4642.