Ahmad, M., S. Afzal, N. Amjad, M. Batool, R. Kausar, and N. Fatima. “Comparison Effects of Postural Drainage and Positive Expiratory Pressure Technique in Community Acquired Pneumonia”. Journal of Health and Rehabilitation Research, vol. 3, no. 2, Dec. 2023, pp. 370-5, doi:10.61919/jhrr.v3i2.93.