1. Lecturer, Department of Islamic Economic Laws, Faculty of Islamic Studies, Universitas Muhammadiyah Surakarta, Indonesia; Doctoral Student, Department of Islamic Economics, Faculty of Economics and Business, Universitas Airlangga
2. Lecturer, Department of Islamic Economics, Faculty of Economics and Business, Universitas Airlangga
3. Bachelor Student, Department of Islamic Economic Laws, Faculty of Islamic Studies, Universitas Muhammadiyah Surakarta
4. M.Sc., Department of Islamic Economic and Law, Faculty of Religion, Muhammadiyah University of Surakarta