Authors
Poznań University of Economics and Business, Department of Economic Publicity and Public Relations, Poland
Poznań University of Economics and Business, Product Marketing Department, Poland
© 2020 Krzysztof Gołata, Bogdan Sojkin, published by ŁUKASIEWICZ RESEARCH NETWORK – INSTITUTE OF AVIATION
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.