Quissesa, A. et al. 2021. HIGH-FREQUENCY CHEST WALL OSCILLATION: AIRWAY CLEARANCE MANAGEMENT FOR OBSTRUCTIVE PULMONARY DISEASE PATIENTS. Nursing Current: Jurnal Keperawatan. 9, 2 (Dec. 2021), 116–127. DOI:https://doi.org/10.19166/nc.v9i2.4916.