Khairul Anuar, N. F., and M. F. . Mohd Yousof. “Motor Current Signature Analysis and Vibration Test on Rotating Machines of Chiller System at Uthm G2 Building”. Evolution in Electrical and Electronic Engineering, vol. 2, no. 2, Nov. 2021, pp. 968-7, https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/4568.