Omar Ali Saifuddin bin Wan Ismail, W, Noraini binti Hamzah, and Khalid bin Jusoh. “Innovation and Skills Workers of Mechanical Engineer to Design Smart Flush”. International Journal of Engineering & Technology 7, no. 2.15 (April 6, 2018): 30–34. Accessed May 2, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/11195.