Mihajlović A, Gajić J. HIGHER EDUCATION IN THE DIGITAL MARKETING AGE: EVALUATING THE COST-EFFECTIVENESS OF INSTAGRAM CAMPAIGN AD FORMATS USING A/B TESTING. ejae [Internet]. 24. April 2025. [citirano 20. Septembar 2026.];22(1):32-5. Dostupno na: https://test.aseestant.ceon.rs/index.php/sjas/article/view/52951