THE EFFECT OF PURSED LIP BREATHING (PLB) EXERCISE ON RESPIRATORY STATUS IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD). Jurnal Perawat Indonesia [Internet]. 2023 May 30 [cited 2026 Jan. 24];7(1):1259-65. Available from: https://journal.ppnijateng.org/jpi/article/view/2180