Prof. Dr. Norhamidi Bin Muhamad, T. A. A. A. P. D. M. N. B. A. R. “Review Study on Factors Affecting on Maintenance Cost and Production Rate in The Power Plant”. Design Engineering, Aug. 2021, pp. 6145- 6156, http://www.thedesignengineering.com/index.php/DE/article/view/3112.