Authors
katarzyna.smialowicz@gmail.com
Poznan University of Economics, Department of Product Marketing, Poznan, Poland
katarzyna.smialowicz@gmail.com
© 2020 Katarzyna Śmiałowicz, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.