Khattak, Muhammad Adil, Mohamamd Azfar Haziq Ayoub, Muhammad Ariff Fadhlillah Abdul Manaf, Mohd Faidhi Mahrul, Mohd Ridwan Mohd Juhari, and Mira Idora Mustaffa. 2018. “Disputed Keystone XL Pipeline Project and Its Implications on Global Energy Security Scenario”. Progress in Energy and Environment 5 (May):1-15. https://www.akademiabaru.com/submit/index.php/progee/article/view/1042.