Spasić, Kristina, Milena Marjanović, and Jovan Kitanović. “THE ABC MODEL: FROM COST MANAGEMENT TO SUSTAINABLE STRATEGY FOR A TRAVEL AGENCY”. Tourism International Scientific Conference Vrnjačka Banja - TISC 9, no. 1 (October 16, 2026): 255-264. Accessed October 19, 2026. https://tisc.rs/proceedings/index.php/hitmc/article/view/535.