Siti Zarina Mohd Muji, Mohamad Hairol Jabbar, and Norfaiza Fuad, ELECTRICAL & ELECTRONIC ENGINEERING: THEORY AND APPLICATIONS SERIES 3: ULTRASONIC AND APPLICATION. Penerbit UTHM, 2016. Accessed: Jul. 01, 2024. [Online]. Available: https://publisher.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/199