1. Doctoral School of Management and Organizational Science Faculty of Economic Science Hungarian University of Agriculture and Life Science Kaposvar Hungary
2. Department of Public Health Faculty of Health Universitas Nahdlatul Ulama Surabaya Surabaya Indonesia
3. Department of Geography Tourism and Hotel Management Faculty of Science University of Novi Sad Novi Sad Serbia
4. Public Health Study Program Faculty of Public Health Sumbersari Universitas Jember Jember Indonesia