Mairizal, and Agus Taufik. “Relationship Model of Competitiveness and Productivity of Engineering Procurement and Construction for Indonesia Construction Industry”. International Journal of Sustainable Construction Engineering and Technology 14, no. 2 (May 8, 2023): 96–104. Accessed May 6, 2024. https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/13979.