Nadiya Garnis Sallyfan, Endro Yulianto, and Torib Hamzah. “Peak Flow Meter Equipped With Inspection Results Indicator”. Journal of Electronics, Electromedical Engineering, and Medical Informatics 2, no. 1 (January 6, 2020): 7-12. Accessed August 18, 2025. http://www.jeeemi.org/index.php/jeeemi/article/view/66.