Lop, Nor Suzila, and Kharizam Ismail. “Criteria in Selecting Key Performance Indicators for Public Private Partnership (PPP) Projects”. International Journal of Sustainable Construction Engineering and Technology 14, no. 3 (September 21, 2023): 299–308. Accessed July 18, 2024. https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/15029.