1. Department of Business Administration, Faculty of Administrative Science, Hadhramout University, Al Mukalla, Yemen
2. Graduate School of Business, Universiti Sains Malaysia, Pulau Pinang, Malaysia
3. Department of Marketing and Production, Faculty of Administrative Science, Thamar University, Dhamar, Yemen
4. Department of Tourism and Hotel Management, Umm Al Qura University, Makkah, Saudi Arabia
5. Department of Business Administration, Faculty of Administrative and Financial Science, Arab American University, Palestine