“Alat Pengukur Saturasi Oksigen Dalam Darah Menggunakan Metode Photoplethysmograph Reflectance”. 2020. Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics 3 (2): 84-93. https://doi.org/10.15408/fiziya.v3i2.17721.