1. Department of Management, Faculty of Applied Sciences, WSB University, 41-300 Dabrowa Gornicza, Poland
2. The London Academy of Science and Business, 120 Baker St., London W1U 6TU, UK
3. Department of Marketing, Sumy State University, 116, Kharkivska St., 40007 Sumy, Ukraine
4. Department of Accounting and Taxation, Sumy State University, 116, Kharkivska St., 40007 Sumy, Ukraine