UBAVIĆ, Predrag. MARKETING CONCEPT IN THE FUNCTION OF TOURISM BUSINESS IMPROVEMENT. BizInfo Blace, [S. l.], v. 5, n. 2, p. 45–55, 2014. DOI: 10.5937/Bizinfo1402045U. Disponível em: https://www.bizinfo.edu.rs/index.php/bizinfo/article/view/32. Acesso em: 25 may. 2026.