Unterberger, Marija, Predrag Vešović, Katarina Mostarac, Dragana Šarac, and Spasenija Ožegović. “Three-Dimensional Corporate Social Responsibility Model of a Postal Service Provider”. Promet - Traffic&Transportation 30, no. 3 (July 5, 2018): 349-359. Accessed April 19, 2024. http://traffic.fpz.hr/index.php/PROMTT/article/view/2761.