Authors
Elżbieta Bukalska
elzbieta.bukalska@umcs.lublin.pl
Faculty of Economics, Maria Curie-Sklodowska University in Lublin, Lublin, Poland
elzbieta.bukalska@umcs.lublin.pl
© 2019 Elżbieta Bukalska, published by Warsaw School of Economics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.