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 Med J., vol. 11, no. 3, pp. 1116–1120, Sep. 2022.