Che Haron, R. ., M. A. N. . Masrom, and K. . Kamal. “Assessing Causes of Contractual Disputes from Different Type of Condition of Contracts”. International Journal of Sustainable Construction Engineering and Technology, vol. 11, no. 4, Feb. 2021, pp. 45-59, https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/8081.