Cvijanovic, Drago, Branko Mihailovic, and Aleksandra Nikolic. “Market Research and Marketing Information Systems”. International Journal of Economic Practices and Theories 4, no. 2 (February 1, 2014): 191-198. Accessed July 26, 2026. http://inscriere.excelis.ase.ro/index.php/ijept/article/view/Market_Research_and_Marketing_Information_Systems.