1. Institute of Energy Policy and Research, College of Business Management and Accounting, Universiti Tenaga Nasional, Jalan Kajang-Puchong, Kajang 43000, Selangor, Malaysia
2. Othman Yeop Abdullah Graduate School of Business (OYAGSB) and Institute of Sustainable, Growth and Urban Development (ISGUD), Universiti Utara Malaysia, Bukit Kayu Hitam 06010, Kedah, Malaysia