M. N. N. . Yusjah, H. . Abd Kahar, and M. Z. . Amat Rithuan, “Smart Step Ladder”, MARI, vol. 2, no. 3, pp. 154–158, Dec. 2021, Accessed: Apr. 08, 2026. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/5086