Abdul-Razak, Nor Azam, Nur Hafizah Ismail, Mohd Zaini Abd Karim, Roslan Abdul-Hakim, and Arshian Sharif. “Does Energy Productivity Affect a Country’s Economic Efficiency? Evidence from Selected ASEAN Countries”. Journal of Economics and Sustainability 8, no. 1 (January 31, 2026): 84–101. Accessed October 2, 2026. https://e-journal.uum.edu.my/index.php/jes/article/view/29497.