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 12. Juli 2026.];22(1):32-5. Dostupno na: https://asistent.ceon.rs/index.php/sjas/article/view/52951