Ismail, Siti Nur Ayunie, and Mohd Hafizal Ishak. “Facilities Management Service Providers Competencies Reviews for Managing Green Buildings in Malaysia”. Journal of Technology Management and Business, vol. 8, no. 2, Dec. 2021, pp. 38-46, https://publisher.uthm.edu.my/ojs/index.php/jtmb/article/view/9656.