Avgeli, Vaso, Mohanad Dahlan, Ali Bakir, and Eugenia Wickens. “4IR Impacts on Tourism Education and Industry”. Journal On Tourism & Sustainability 4, no. 1 (December 1, 2020): 06-15. Accessed January 17, 2021. http://ontourism.online/index.php/jots/article/view/86.