Ioncică M, Petrescu EC, Ioncică DE. Innovations in Selling Tourism Products and Their Impact on the Efficiency of the Activity of Travel Agencies and Sustainability. IJEPT [Internet]. 2015Oct.1 [cited 2026Jul.27];5(5):495-502. Available from: http://ijept.eu/index.php/ijept/article/view/Innovations_in_Selling_Tourism_Products_and_Their_Impact_on_th