SWA, A., I. R, S. C. Widjanantie, and N. Nusdwinuringtyas. Improvement of the Functional Parameter in Patient With Chronic Obstructive Pulmonary Disease After Pulmonary Rehabilitation. Vol. 6, no. 02, Nov. 2017, pp. 44 -50, doi:10.36803/ijpmr.v6i02.161.