Mulyadi, I. M. . Junita, T. . Zulfikar, N. . Yusuf, M. . Azhary, and H. M. . Salim. “The Effect of Pursed-Lips Breathing and Diaphragm Exercises on the Quality of Life of COPD Patient Assessed by Six-Minutes Walk Test”. Bali Medical Journal, vol. 11, no. 3, Sept. 2022, pp. 1116-20, doi:10.15562/bmj.v11i3.3474.