suyanto, suyanto, & Al Islami, V. E. (2020). THE DIFFERENCE IN OXYGEN SATURATION VALUES OF COPD PATIENTS USING PURSED LIP BREATHING AND 6 MINUTES WALK EXERCISE. Jurnal Bahana Kesehatan Masyarakat (Bahana of Journal Public Health), 4(1), 17 - 22. https://doi.org/https://doi.org/10.35910/jbkm.v4i1.250