Authors
Poznań University of Economics and Business, Institute of Marketing, Poznań, Poland
University of Warmia and Mazury in Olsztyn, Institute of Economics and Finances, Poland
© 2020 Magdalena Ankiel, Mariola Grzybowska-Brzezińska, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.