Tran, Tuan, Nghia Nguyen, Van Nguyen, and Thi Nguyen. “E-Learner’s Needs for Sustainable Tourism Higher Education: A Case of Vietnam”. e-Review of Tourism Research 18, no. 6 (May 5, 2022): 843–871. Accessed June 26, 2022. https://ertr-ojs-tamu.tdl.org/ertr/index.php/ertr/article/view/681.