Authors
beata.nowotarska-romaniak@ue.katowice.pl
University of Economics in Katowice, College of Management, Department of Marketing, Katowice, Poland
beata.nowotarska-romaniak@ue.katowice.pl
© 2020 Beata Nowotarska-Romaniak, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.