Yusop, A., S. Zain, H. D. Nazri, and S. N. . Ali Yusuf. “Pemeriksa Oksigen Darah Dan Denyut Nadi”. Multidisciplinary Applied Research and Innovation, vol. 3, no. 1, Feb. 2022, pp. 390-5, https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/3500.