1. Dr., Lecturer, Department of Management, Faculty of Economics and Business, Universitas Negeri Padang [Padang State University], Indonesia
2. Dr., Lecturer, Department of Management, Faculty of Economics and Business, Universitas Andalas [Andalas University], Indonesia
3. Dr., Lecturer, Department of Economics, Faculty of Economics and Business, Universitas Negeri Padang [Padang State University], Indonesia
4. Dr., Lecturer, Department of Economics Education, Faculty of Economics and Business, Universitas Negeri Padang [Padang State University], Indonesia
5. Master, Lecturer, Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan [Medan State University], Indonesia