Tay Kim Gaik, Phang Chang, and Lim Kian Boon, NUMERICAL METHOD WITH CASIO FX-570ES PLUS CALCULATOR. Penerbit UTHM, 2017. Accessed: Aug. 26, 2026. [Online]. Available: https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/150