1. Department of Informatics, Faculty of Industrial Technology, Universitas Islam Indonesia, Yogyakarta, Indonesia
2. Department of Management, Faculty of Economics and Business, Universitas Gadjah Mada, Yogyakarta, Indonesia
3. Department of Management, Faculty of Business, Universitas Kristen Duta Wacana, Yogyakarta, Indonesia
4. Faculty of Economics and Business, Universitas Gadjah Mada, Yogyakarta, Indonesia
5. School of Economics and Business, Telkom University, Bandung, Indonesia