Imron Rosyadi et al. 2019. Pengaruh Pemberian Pursed Lip-Breathing, Diaphragmatic Breathing, dan Upper Limb Stretching Terhadap Skala Dispnea pada Pasien PPOK: The Effect of Pursed Lip-Breathing, Diaphragmatic Breathing, and Upper Limb Stretching on Dyspnea Scale in COPD Patients. NERS Jurnal Keperawatan. 15, 2 (Oct. 2019), 103–109. DOI:https://doi.org/10.25077/njk.v15i2.174.