FERNANDEZ, Guillermina, and Aldo Guzman RAMOS. “SUSTAINABILITY IN TOURISM THROUGH ENVIRONMENTAL EDUCATION APPLIED TO ITINERARIES”. Revista De Turism - Studii și cercetări în Turism, no. 19, June 2015, pp. 8-14, https://revistadeturism.ro/index.php/rdt/article/view/493.