Setijaningsih, Triana, Giana Irda Fazira, and Tri Cahyo Sepdianto. 2019. “CHANGES IN BREATHING SOUND AND BREATHING FREQUENCY OF CLIENTS WHO HAVE CHRONIC OBSTRUCTION PULMONARY DISEASE (COPD) WITH CHEST PHYSIOTHERAPY IN MARDI WALUYO HOSPITAL, BLITAR”. Bali Medika Jurnal 6 (2), 147-54. https://doi.org/10.36376/bmj.v6i2.77.