Authors
Karolina Nessel
Jagiellonian University in Cracow, Faculty of Management and Social Communication
Dariusz Drewniak
Jagiellonian University in Cracow, Faculty of Management and Social Communication
© 2020 Karolina Nessel, Dariusz Drewniak, published by University of Physical Education in Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.