Authors
miroslawa.pluta-olearnik@ue.wroc.pl
Wroclaw University of Economics, Faculty of Management, Department of Marketing
miroslawa.pluta-olearnik@ue.wroc.pl
© 2019 Mirosława Pluta-Olearnik, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.