Widoroni CEP, Andri F, Kristian EH. The Effect of Exercises Pursed Lips Breathing (PLB) Changes To Scale Of Breathlessness and Oxygen Saturation In COPD Patients At Hospital Dr. Soedarso Pontianak . J. Nurs. Pract [Internet]. 2021 Oct. 1 [cited 2025 Sep. 11];5(1):176-81. Available from: https://www.thejnp.org/index.php/jnp/article/view/169