Cvetkoska, V., and F. Iliev. “Criteria of Successful Career in Sales: Sales Managers Perspective”. ENTRENOVA - ENTerprise REsearch InNOVAtion, vol. 2, no. 1, Oct. 2016, pp. 39-46, https://hrcak.srce.hr/ojs/index.php/entrenova/article/view/14126.