Ioncică, Maria, Eva Cristina Petrescu, and Diana Eugenia Ioncică. “Innovations in Selling Tourism Products and Their Impact on the Efficiency of the Activity of Travel Agencies and Sustainability”. International Journal of Economic Practices and Theories 5, no. 5 (October 1, 2015): 495-502. Accessed May 9, 2025. http://ijept.eu/index.php/ijept/article/view/Innovations_in_Selling_Tourism_Products_and_Their_Impact_on_th.