Authors
Imre Milán Harcsa
University of Debrecen, Faculty of Economics and Business, Kékcse Kanyári Str. 2,, Debrecen, Hungary
© 2018 Imre Milán Harcsa, published by John Paul II University of Applied Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.