Hanafi, Mohd Hanizun, et al. “Contractors’ Perspective on the Benefits of Implementing Industrialized Building System (IBS)”. International Journal of Sustainable Construction Engineering and Technology, vol. 6, no. 1, Aug. 2015, pp. 44-51, https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/948.