MIHAJLOVIĆ, Aleksandar; GAJIĆ, Jelena. HIGHER EDUCATION IN THE DIGITAL MARKETING AGE: EVALUATING THE COST-EFFECTIVENESS OF INSTAGRAM CAMPAIGN AD FORMATS USING A/B TESTING. The European Journal of Applied Economics, [S. l.], v. 22, n. 1, p. 32–52, 2025. DOI: 10.5937/ejae22-52951. Dostupno na: https://asistent.ceon.rs/index.php/sjas/article/view/52951. Pristupljeno: 12 jul. 2026.