1. Lyceum of the Philippines University, Manila, Philippines
2. Department of Business Administration, Faculty of Economics and Administrative Sciences, The Hashemite University, Zarqa, Jordan
3. Bachelor Program in Leisure Industry Management, Commercial College, Chinese Culture University, Taipei City, Taiwan
4. Department of Doctoral Program, Faculty Economic and Business, Universitas Sumatera Utara, Medan, Indonesia
5. USU Campus, Padang bulan, Medan, Indonesia
6. Department of Economics, College of Business and Administration, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
7. Universidad Nacional Santiago Antúnez de Mayolo, Huaraz, Perú
8. Faculty of Economics & Management Sciences at the University of Garden City, Sudan