Authors
Beata Gosk
Faculty of Economic Sciences University of Warsaw, Warsaw, Poland
Natalia Nehrebecka
Faculty of Economic Sciences University of Warsaw, Warsaw, Poland
© 2020 Beata Gosk, Natalia Nehrebecka, published by Faculty of Economic Sciences, University of Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.